Computation of Ratio of Earnings to fixed charges and
Earnings to fixed charges and preferred dividends
($ in thousands, except ratios)

				For the Years Ended December 31,

	For the Three Months Ended March 31, 2012			For the Years Ended December 31,
	For the Three Months Ended March 31, 2012			2011			2010			2009			2008			2007
Earnings:
Pre-tax income from continuing operations before earnings from equity method investments and other items(1)	$	(88,454	)	$	(153,762	)	$	(250,537	)	$	(793,786	)	$	(322,646	)	$	106,840
Add: Fixed charges as calculated below		86,956			348,664			349,041			485,624			671,304			635,277
Add: Distributions of earnings from equity method investments		11,358			85,766			32,650			36,766			48,196			49,486
Less: Capitalized interest		(280	)		(788	)		(466	)		(263	)		(2,501	)		(3,994	)

Total earnings	$	9,580		$	279,880		$	130,688		$	(271,659	)	$	394,353		$	787,609
Fixed charges:
Interest expense(2)	$	86,143		$	345,914		$	346,500		$	481,116		$	666,706		$	629,272
Add: Capitalized interest		280			788			466			263			2,501			3,994
Implied interest component on the company's rent obligations		533			1,962			2,075			4,245			2,097			2,011

Fixed charges		86,956		$	348,664		$	349,041		$	485,624		$	671,304		$	635,277
Preferred dividends		10,580			42,320			42,320			42,320			42,320			42,320

Fixed charges and preferred dividends	$	97,536		$	390,984		$	391,361		$	527,944		$	713,624		$	677,597
Earnings to fixed charges(3)		—			—			—			—			—			1.2x
Earnings to fixed charges and preferred dividends(3)		—			—			—			—			—			1.2x
Explanatory Notes:

(1): Prior period presentation has been restated to conform to current period presentation.
(2): For the years ended December 31, 2011, 2010, 2009, 2008 and 2007, interest expense includes $1,126, $31,632, $68,025, $49,177 and $19,760, respectively, of interest expense reclassified to discontinued operations.
(3): For the three months ended March 31, 2012, earnings were not sufficient to cover fixed charges by $77,376 and earnings were not sufficient to cover fixed charges and preferred dividends by $87,956. For the years ended December 31, 2011, 2010, 2009 and 2008, earnings were not sufficient to cover fixed charges by $68,784, $218,353, $757,283 and $276,951, respectively, and earnings were not sufficient to cover fixed charges and preferred dividends by $111,104, $260,673, $799,603 and $319,271, respectively.