Exhibit 12.1

Computation of Ratio of Earnings to Fixed Charges
($ in thousands)

	Six months
	Ended
	June 30,			Year Ended December 31,
	2010			2009			2008			2007			2006			2005
Income (Loss) from continuing operations before income taxes (a)	$	(50,266	)	$	294,332		$	1,667,176		$	1,427,289		$	1,237,729		$	618,231
Fixed charges:
Interest expense (b)		195,838			383,785			264,418			183,128			109,216			80,189
Capitalized Interest		11,938			32,409			30,071			2,624			2,483			2,072
Interest factor portion of rentals (c)		31,956			63,043			47,198			43,212			30,275			23,290
Total fixed charges		239,732			479,237			341,687			228,964			141,974			105,551
Less: Capitalized Interest		(11,938	)		(32,409	)		(30,071	)		(2,624	)		(2,483	)		(2,072	)
Earnings before income taxes and fixed charges	$	177,528		$	741,160		$	1,978,792		$	1,653,629		$	1,377,220		$	721,710
Ratio of earnings to fixed charges		0.74	(d)		1.55			5.79			7.22			9.70			6.84

(a)	Income from continuing operations before income taxes has been adjusted to include only distributed income of less-than-fifty-percent-owned persons.
(b)	Interest expense consists of interest expense incurred from continuing operations and amortization of debt issuance costs.
(c)	Interest factor portion of rentals is estimated to be one-third of rental expense.
(d)	For the six months ended June 30, 2010, earnings, as defined, before fixed charges were inadequate to cover fixed charges by $62.2 million.

1