<informationTable xmlns="http://www.sec.gov/edgar/document/thirteenf/informationtable">		<infoTable>
			<nameOfIssuer>ACADIA HEALTHCARE COMPANY IN</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>00404A109</cusip>
			<value>127499</value>
			<shrsOrPrnAmt>
				<sshPrnamt>4350000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>4350000</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>ADVANCED MICRO DEVICES INC</nameOfIssuer>
			<titleOfClass>NOTE 2.125% 9/0</titleOfClass>
			<cusip>007903BD8</cusip>
			<value>8173</value>
			<shrsOrPrnAmt>
				<sshPrnamt>2500000</sshPrnamt>
				<sshPrnamtType>PRN</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>2500000</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>ALTABA INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>021346101</cusip>
			<value>618857</value>
			<shrsOrPrnAmt>
				<sshPrnamt>8349395</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>8349395</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>APPLE INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>037833100</cusip>
			<value>55655</value>
			<shrsOrPrnAmt>
				<sshPrnamt>293000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<putCall>Put</putCall>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>293000</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>ARCONIC INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>03965L100</cusip>
			<value>991850</value>
			<shrsOrPrnAmt>
				<sshPrnamt>51902133</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>51902133</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>B RILEY FINL INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>05580M108</cusip>
			<value>38495</value>
			<shrsOrPrnAmt>
				<sshPrnamt>2306450</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>2306450</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>BRISTOL MYERS SQUIBB CO</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>110122108</cusip>
			<value>155058</value>
			<shrsOrPrnAmt>
				<sshPrnamt>3250000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>3250000</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>BRISTOL MYERS SQUIBB CO</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>110122108</cusip>
			<value>40363</value>
			<shrsOrPrnAmt>
				<sshPrnamt>846000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<putCall>Call</putCall>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>846000</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>CARBONITE INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>141337105</cusip>
			<value>29445</value>
			<shrsOrPrnAmt>
				<sshPrnamt>1186800</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>1186800</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>CITRIX SYS INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>177376100</cusip>
			<value>607029</value>
			<shrsOrPrnAmt>
				<sshPrnamt>6091000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>6091000</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>CITRIX SYS INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>177376100</cusip>
			<value>49830</value>
			<shrsOrPrnAmt>
				<sshPrnamt>500000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<putCall>Call</putCall>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>500000</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>COLUMBIA PPTY TR INC</nameOfIssuer>
			<titleOfClass>COM NEW</titleOfClass>
			<cusip>198287203</cusip>
			<value>11153</value>
			<shrsOrPrnAmt>
				<sshPrnamt>495484</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>495484</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>COMMUNITY HEALTH SYS INC NEW</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>203668108</cusip>
			<value>16785</value>
			<shrsOrPrnAmt>
				<sshPrnamt>4500000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>4500000</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>COMMVAULT SYSTEMS INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>204166102</cusip>
			<value>57962</value>
			<shrsOrPrnAmt>
				<sshPrnamt>895308</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>895308</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>CORMEDIX INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>21900C308</cusip>
			<value>7875</value>
			<shrsOrPrnAmt>
				<sshPrnamt>833373</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>833373</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>DELL TECHNOLOGIES INC</nameOfIssuer>
			<titleOfClass>CL C</titleOfClass>
			<cusip>24703L202</cusip>
			<value>658198</value>
			<shrsOrPrnAmt>
				<sshPrnamt>11214831</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>11214831</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>DELL TECHNOLOGIES INC</nameOfIssuer>
			<titleOfClass>CL C</titleOfClass>
			<cusip>24703L202</cusip>
			<value>58690</value>
			<shrsOrPrnAmt>
				<sshPrnamt>1000000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<putCall>Call</putCall>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>1000000</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>DEVON ENERGY CORP NEW</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>25179M103</cusip>
			<value>553089</value>
			<shrsOrPrnAmt>
				<sshPrnamt>17825000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>17825000</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>DEVON ENERGY CORP NEW</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>25179M103</cusip>
			<value>94680</value>
			<shrsOrPrnAmt>
				<sshPrnamt>3000000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<putCall>Call</putCall>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>3000000</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>DIGITAL RLTY TR INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>253868103</cusip>
			<value>47600</value>
			<shrsOrPrnAmt>
				<sshPrnamt>400000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<putCall>Put</putCall>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>400000</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>DISH NETWORK CORP</nameOfIssuer>
			<titleOfClass>NOTE 2.375% 3/1</titleOfClass>
			<cusip>25470MAD1</cusip>
			<value>122282</value>
			<shrsOrPrnAmt>
				<sshPrnamt>148700000</sshPrnamt>
				<sshPrnamtType>PRN</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>148700000</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>DISH NETWORK CORP</nameOfIssuer>
			<titleOfClass>NOTE 3.375% 8/1</titleOfClass>
			<cusip>25470MAB5</cusip>
			<value>222458</value>
			<shrsOrPrnAmt>
				<sshPrnamt>260800000</sshPrnamt>
				<sshPrnamtType>PRN</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>260800000</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>EBAY INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>278642103</cusip>
			<value>92850</value>
			<shrsOrPrnAmt>
				<sshPrnamt>2500000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<putCall>Call</putCall>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>2500000</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>EBAY INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>278642103</cusip>
			<value>367686</value>
			<shrsOrPrnAmt>
				<sshPrnamt>9900000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>9900000</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>ELEMENT SOLUTIONS INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>28618M106</cusip>
			<value>110608</value>
			<shrsOrPrnAmt>
				<sshPrnamt>10951281</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>10951281</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>EP ENERGY CORP</nameOfIssuer>
			<titleOfClass>CL A</titleOfClass>
			<cusip>268785102</cusip>
			<value>1300</value>
			<shrsOrPrnAmt>
				<sshPrnamt>5000000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>5000000</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>EQT CORP</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>26884L109</cusip>
			<value>45102</value>
			<shrsOrPrnAmt>
				<sshPrnamt>2174661</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>2174661</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>EQUINIX INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>29444U700</cusip>
			<value>67974</value>
			<shrsOrPrnAmt>
				<sshPrnamt>150000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<putCall>Put</putCall>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>150000</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>FIRSTENERGY CORP</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>337932107</cusip>
			<value>1042066</value>
			<shrsOrPrnAmt>
				<sshPrnamt>25043653</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>25043653</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>FOX CORP</nameOfIssuer>
			<titleOfClass>CL B COM</titleOfClass>
			<cusip>35137L204</cusip>
			<value>20450</value>
			<shrsOrPrnAmt>
				<sshPrnamt>569954</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>569954</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>FOX CORP</nameOfIssuer>
			<titleOfClass>CL A COM</titleOfClass>
			<cusip>35137L105</cusip>
			<value>127353</value>
			<shrsOrPrnAmt>
				<sshPrnamt>3469158</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>3469158</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>GENESEE &amp; WYO INC</nameOfIssuer>
			<titleOfClass>CL A</titleOfClass>
			<cusip>371559105</cusip>
			<value>5446</value>
			<shrsOrPrnAmt>
				<sshPrnamt>62500</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>62500</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>HEALTHCARE RLTY TR</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>421946104</cusip>
			<value>24343</value>
			<shrsOrPrnAmt>
				<sshPrnamt>758112</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>758112</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>HESS CORP</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>42809H107</cusip>
			<value>1321747</value>
			<shrsOrPrnAmt>
				<sshPrnamt>21945000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>21945000</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>HESS CORP</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>42809H107</cusip>
			<value>48184</value>
			<shrsOrPrnAmt>
				<sshPrnamt>800000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<putCall>Call</putCall>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>800000</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>INTERNATIONAL SPEEDWAY CORP</nameOfIssuer>
			<titleOfClass>CL A</titleOfClass>
			<cusip>460335201</cusip>
			<value>33524</value>
			<shrsOrPrnAmt>
				<sshPrnamt>768376</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>768376</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>INVESCO QQQ TR</nameOfIssuer>
			<titleOfClass>UNIT SER 1</titleOfClass>
			<cusip>46090E103</cusip>
			<value>1390568</value>
			<shrsOrPrnAmt>
				<sshPrnamt>7740000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<putCall>Put</putCall>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>7740000</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>INVESCO QQQ TR</nameOfIssuer>
			<titleOfClass>UNIT SER 1</titleOfClass>
			<cusip>46090E103</cusip>
			<value>1347450</value>
			<shrsOrPrnAmt>
				<sshPrnamt>7500000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<putCall>Call</putCall>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>7500000</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>ISHARES TR</nameOfIssuer>
			<titleOfClass>RUSSELL 2000 ETF</titleOfClass>
			<cusip>464287655</cusip>
			<value>76545</value>
			<shrsOrPrnAmt>
				<sshPrnamt>500000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<putCall>Put</putCall>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>500000</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>ISHARES TR</nameOfIssuer>
			<titleOfClass>U.S. REAL ES ETF</titleOfClass>
			<cusip>464287739</cusip>
			<value>217600</value>
			<shrsOrPrnAmt>
				<sshPrnamt>2500000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<putCall>Put</putCall>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>2500000</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>KKR REAL ESTATE FIN TR INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>48251K100</cusip>
			<value>10370</value>
			<shrsOrPrnAmt>
				<sshPrnamt>518000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>518000</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>MACERICH CO</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>554382101</cusip>
			<value>20386</value>
			<shrsOrPrnAmt>
				<sshPrnamt>470268</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>470268</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>MARRIOTT INTL INC NEW</nameOfIssuer>
			<titleOfClass>CL A</titleOfClass>
			<cusip>571903202</cusip>
			<value>93818</value>
			<shrsOrPrnAmt>
				<sshPrnamt>750000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<putCall>Put</putCall>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>750000</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>MITEK SYS INC</nameOfIssuer>
			<titleOfClass>COM NEW</titleOfClass>
			<cusip>606710200</cusip>
			<value>3609</value>
			<shrsOrPrnAmt>
				<sshPrnamt>294855</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>294855</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>NIELSEN HLDGS PLC</nameOfIssuer>
			<titleOfClass>SHS EUR</titleOfClass>
			<cusip>G6518L108</cusip>
			<value>331380</value>
			<shrsOrPrnAmt>
				<sshPrnamt>14000000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
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			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>14000000</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>NIELSEN HLDGS PLC</nameOfIssuer>
			<titleOfClass>SHS EUR</titleOfClass>
			<cusip>G6518L108</cusip>
			<value>52074</value>
			<shrsOrPrnAmt>
				<sshPrnamt>2200000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<putCall>Call</putCall>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>2200000</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>OPUS BK IRVINE CALIF</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>684000102</cusip>
			<value>107299</value>
			<shrsOrPrnAmt>
				<sshPrnamt>5419153</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>5419153</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>PEABODY ENERGY CORP NEW</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>704551100</cusip>
			<value>797948</value>
			<shrsOrPrnAmt>
				<sshPrnamt>28166201</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>28166201</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>PG&amp;E CORP</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>69331C108</cusip>
			<value>124600</value>
			<shrsOrPrnAmt>
				<sshPrnamt>7000000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<putCall>Call</putCall>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>7000000</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>PRA GROUP INC</nameOfIssuer>
			<titleOfClass>NOTE 3.500% 6/0</titleOfClass>
			<cusip>69354NAB2</cusip>
			<value>1350</value>
			<shrsOrPrnAmt>
				<sshPrnamt>1500000</sshPrnamt>
				<sshPrnamtType>PRN</sshPrnamtType>
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			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>1500000</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>QEP RES INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>74733V100</cusip>
			<value>91143</value>
			<shrsOrPrnAmt>
				<sshPrnamt>11700000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>11700000</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>ROADRUNNER TRNSN SVCS HLDG I</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>76973Q105</cusip>
			<value>356528</value>
			<shrsOrPrnAmt>
				<sshPrnamt>848875548</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>848875548</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>ROAN RES INC</nameOfIssuer>
			<titleOfClass>CL A COM</titleOfClass>
			<cusip>769755109</cusip>
			<value>96502</value>
			<shrsOrPrnAmt>
				<sshPrnamt>15794132</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>15794132</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>RYANAIR HLDGS PLC</nameOfIssuer>
			<titleOfClass>SPONSORED ADS</titleOfClass>
			<cusip>783513203</cusip>
			<value>7752</value>
			<shrsOrPrnAmt>
				<sshPrnamt>103443</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>103443</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>SANOFI</nameOfIssuer>
			<titleOfClass>RIGHT 12/31/2020</titleOfClass>
			<cusip>80105N113</cusip>
			<value>9193</value>
			<shrsOrPrnAmt>
				<sshPrnamt>20428961</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>20428961</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>SAP SE</nameOfIssuer>
			<titleOfClass>SPON ADR</titleOfClass>
			<cusip>803054204</cusip>
			<value>86595</value>
			<shrsOrPrnAmt>
				<sshPrnamt>750000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>750000</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>SELECT SECTOR SPDR TR</nameOfIssuer>
			<titleOfClass>SBI HEALTHCARE</titleOfClass>
			<cusip>81369Y209</cusip>
			<value>45875</value>
			<shrsOrPrnAmt>
				<sshPrnamt>500000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<putCall>Call</putCall>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>500000</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>SEMPRA ENERGY</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>816851109</cusip>
			<value>1428511</value>
			<shrsOrPrnAmt>
				<sshPrnamt>11350000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>11350000</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>SPDR SERIES TRUST</nameOfIssuer>
			<titleOfClass>S&amp;P OILGAS EXP</titleOfClass>
			<cusip>78464A730</cusip>
			<value>670439</value>
			<shrsOrPrnAmt>
				<sshPrnamt>21810000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<putCall>Put</putCall>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>21810000</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>SUNSTONE HOTEL INVS INC NEW</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>867892101</cusip>
			<value>21131</value>
			<shrsOrPrnAmt>
				<sshPrnamt>1467400</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>1467400</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>SYMANTEC CORP</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>871503108</cusip>
			<value>28738</value>
			<shrsOrPrnAmt>
				<sshPrnamt>1250000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>1250000</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>SYMANTEC CORP</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>871503108</cusip>
			<value>28738</value>
			<shrsOrPrnAmt>
				<sshPrnamt>1250000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<putCall>Call</putCall>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>1250000</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>TESLA INC</nameOfIssuer>
			<titleOfClass>NOTE 1.250% 3/0</titleOfClass>
			<cusip>88160RAC5</cusip>
			<value>4110</value>
			<shrsOrPrnAmt>
				<sshPrnamt>4000000</sshPrnamt>
				<sshPrnamtType>PRN</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>4000000</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>TRAVELPORT WORLDWIDE LTD</nameOfIssuer>
			<titleOfClass>SHS</titleOfClass>
			<cusip>G9019D104</cusip>
			<value>106200</value>
			<shrsOrPrnAmt>
				<sshPrnamt>6751409</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>6751409</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>U S WELL SVCS INC</nameOfIssuer>
			<titleOfClass>*W EXP 03/15/202</titleOfClass>
			<cusip>91274U119</cusip>
			<value>2980</value>
			<shrsOrPrnAmt>
				<sshPrnamt>2950000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>2950000</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>VANECK VECTORS ETF TR</nameOfIssuer>
			<titleOfClass>OIL SVCS ETF</titleOfClass>
			<cusip>92189F718</cusip>
			<value>33943</value>
			<shrsOrPrnAmt>
				<sshPrnamt>1970000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<putCall>Put</putCall>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>1970000</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>VANGUARD INDEX FDS</nameOfIssuer>
			<titleOfClass>REAL ESTATE ETF</titleOfClass>
			<cusip>922908553</cusip>
			<value>351986</value>
			<shrsOrPrnAmt>
				<sshPrnamt>4050000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<putCall>Put</putCall>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>01,02</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>4050000</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>VANTAGE ENERGY ACQUISITION</nameOfIssuer>
			<titleOfClass>COM CL A</titleOfClass>
			<cusip>92211L105</cusip>
			<value>40880</value>
			<shrsOrPrnAmt>
				<sshPrnamt>4000000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
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