Exhibit 12.1

STATEMENT REGARDING COMPUTATION OF RATIO OF EARNINGS TO COMBINED FIXED CHARGES

AND PREFERENCE DIVIDENDS

The following illustrates the computation of the historical ratio of earnings to fixed charges (amounts in thousands except ratios). There were no preference securities outstanding for the following periods. Therefore, the ratios of earnings to combined fixed charges and preference dividends are identical to the ratios of earnings to fixed charges.

	Historical														Historical
	Year Ended December 31,														Three Months Ended March 31, 2009
	2004		2005			2006			2007			2008
Fixed Charges:
Interest on debt	$	41,971	$	67,509		$	93,983		$	95,210		$	82,227		$	28,689
Amortization of debt premium, discount and capitalized expenses		6,699		(990	)		(3,143	)		(3,693	)		1,011			9,022
Interest element of rentals *		9,506		13,290			15,770			14,460			15,677			3,790
Total Fixed Charges	$	58,176	$	79,809		$	106,610		$	105,977		$	98,915		$	41,501
Earnings:
Net income (loss)	$	184,327	$	288,130		$	276,632		$	(638,381	)	$	(974,392	)	$	(273,782	)
Add back:
Income tax provision (benefit)		113,336		184,133			179,324			(13,336	)		(169,070	)		(141,385	)
Loss (income) on equity method investment		—		(521	)		2,844			(1,633	)		(2,243	)		87
Fixed charges		58,176		79,809			106,610			105,977			98,915			41,501
Total Earnings	$	355,839	$	551,551		$	565,410		$	(547,373	)	$	(1,046,790	)	$	(373,579	)
Ratio of Earnings to Fixed Charges		6.1x		6.9x			5.3x			(5.2x	)		(10.6x	)		(9.0x	)
Additional total earnings required to achieve a 1.0x ratio:		n/a		n/a			n/a		$	653,350		$	1,145,705		$	415,080

* We determined the interest component of rent expense to be 10%.