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**EMBARGO: No electronic distribution, Web posting or street sales before Saturday 3:01 a.m. ET March. 24, 2012. No exceptions for any reasons. EMBARG...

President Barack Obama prepares to speak at a news conference in the Rose Garden of the White House, in Washington, March 23, 2012. Obama nominated D...

Former Massachusetts Gov. Mitt Romney, a candidate for the Republican presidential nomination, speaks during a campaign stop at QEP Resources in Shrev...

Former Massachusetts Gov. Mitt Romney, a candidate for the Republican presidential nomination, speaks during a campaign stop in Metairie, La., March 2...

Former Massachusetts Gov. Mitt Romney, a candidate for the Republican presidential nomination, during a campaign stop in Metairie, La., March 23, 2012...

Former Massachusetts Gov. Mitt Romney, a candidate for the Republican presidential nomination, speaks during a campaign stop in Metairie, La., March 2...

Former Pennsylvania Sen. Rick Santorum, a candidate for the Republican presidential nomination, takes pictures with supporters after speaking at a cam...

In a two-picture combination, former Pennsylvania Sen. Rick Santorum, center left, a candidate for the Republican presidential nomination, speaks duri...

Giovanni Bulgari, a member of the Bulgari watch and jewelry dynasty, at his family's vineyard in Tuscany, Italy, March 13, 2012. Bulgari and another f...

Giovanni Bulgari, a member of the Bulgari watch and jewelry dynasty, at his family's vineyard in Tuscany, Italy, March 13, 2012. Bulgari and another f...

Tibetan monks make their way through Labrang Monastery in the Xiahe County of Gansu Province, China, March 13, 2012. Over the past year more than two...

RETRANSMISSION TO PROVIDE ALTERNATE CROP -- President Barack Obama during a speech at a pipe yard outside Cushing, Okla., March, 22, 2012. Obama expl...

President Barack Obama during a speech at a pipe yard outside Cushing, Okla., March, 22, 2012. Obama explained his energy policies Thursday at the sit...

A Tibetan monk makes his way through Ta'er Monastery in Xining, Qinghai province's capital city, in China, March 12, 2012. Over the past year more tha...

Tibetan monks participate in prayer ceremony at Ta'er Monastery in Xining, Qinghai province's capital city, in China, March 11, 2012. Over the past ye...

A security camera at Ta'er Monastery in Xining, Qinghai province's capital city, in China, March 11, 2012. Over the past year more than two dozen Tibe...

Tibetan monks make their way through Labrang Monastery in the Xiahe County of Gansu Province, China, March 13, 2012. Over the past year more than two...

Tibetan monks make their way through Labrang Monastery in the Xiahe County of Gansu Province, China, March 13, 2012. Over the past year more than two...

Tibetan monks participate in morning prayer at Labrang Monastery in the Xiahe County of Gansu Province, China, March 13, 2012. Over the past year more...

New York Jets Tim Tebow T-shirts are put on display at the Times Square storefront of Modell's Sporting Goods in New York, March 22, 2012. The Denver...

New York Jets Tim Tebow T-shirts are put on display at the Times Square storefront of Modell's Sporting Goods in New York, March 22, 2012. The Denver...

FILE -- A faulty DePuy artificial hip removed from a patient in Hartlepool, England, Sept. 24, 2010. Johnson & Johnson executives decided in 2009 to p...

A New York Jets Tim Tebow T-shirt is put on display at the Times Square storefront of Modell's Sporting Goods in New York, March 22, 2012. The Denver...

FILE -- A faulty DePuy artificial hip removed from a patient in Hartlepool, England, Sept. 24, 2010. Johnson & Johnson executives decided in 2009 to p...

Nikki Clayton makes signs in support of Trayvon Martin, the 17-year-old who was shot to death by a neighborhood watchman last month, at Goldsboro West...

A makeshift memorial for Trayvon Martin, the 17-year-old who was shot to death by a neighborhood watchman last month, near the gated community where M...

Protesters stage a demonstration, against the handling of the investigation of the shooting of Trayvon Martin, outside the Sanford Police Department i...

A man passes out flyers to protesters outside the Sanford Police Department in Sanford, Fla., March 22, 2012. Under pressure to resign over the invest...

Attendees at a rally against the police handling of the shooting of Trayvon Martin in Sanford, Fla., March 22, 2012. Under pressure to resign over the...

Attendees at a rally against the police handling of the shooting of Trayvon Martin in Sanford, Fla., March 22, 2012. Under pressure to resign over the...

Former House Speaker Newt Gingrich, a candidate for the Republican presidential nomination, speaks at a campaign event while holding an Etch A Sketch...

A supporter at a campaign event for former House Speaker Newt Gingrich, a candidate for the Republican presidential nomination, at Louisiana State Uni...

Former House Speaker Newt Gingrich, a candidate for the Republican presidential nomination, holds an Etch A Sketch at a campaign event at Louisiana St...

Former House Speaker Newt Gingrich, a candidate for the Republican presidential nomination, arrives at a campaign event at Louisiana State University...

John McFarland, a marketing executive for Chevrolet, right, and Ross Martin, executive vice president of MTV Scratch, a unit of Viacom, at General Mot...

John McFarland, a marketing executive for Chevrolet, right, and Ross Martin, executive vice president of MTV Scratch, a unit of Viacom, at General Mot...

Visitors view one of Keith Haring's untitled works on display during the first day of public viewing of the "Keith Haring. 1978-1982" exhibit at the B...

A display of Keith Haring's art during the first day of public viewing of the "Keith Haring. 1978-1982" exhibit at the Brooklyn Museum in New York, Ma...

A visitor takes a photo of Keith Haring's "Matrix," during the first day of public viewing of the "Keith Haring. 1978-1982" exhibit at the Brooklyn Mu...

FILE -- The New York Law School in New York, Dec., 19, 2008. Recently, a New York Supreme Court judge dismissed a lawsuit brought by?nine graduates?of...

The remnants of a century-old, two-story warehouse under demolition that collapsed in New York, March 22, 2012. The building, which was being removed...

The remnants of a century-old, two-story warehouse under demolition that collapsed in New York, March 22, 2012. The building, which was being removed...

White House Press Secretary Jay Carney talks with Secretary of the Interior Ken Salazar as President Barack Obama arrives in Oklahoma City, March, 21,...

Assemblyman Hakeem Jeffries in the chamber of the New York State Assembly during session in Albany, N.Y., March, 14, 2012. Jeffries is one of several...

Councilman Jumaane Williams speaks at a rally to reform the New York Police Department policy of stop-and-frisk in New York, Feb. 26, 2012. Stop-and-f...

President Barack Obama speaks after touring the Center for Automotive Research at Ohio State University in Columbus, Ohio, March, 22, 2012. Obama anou...

President Barack Obama speaks at a pipe yard outside Cushing, Okla., March, 22, 2012. Obama explained his energy policies Thursday at the site of the...

President Barack Obama looks at a battery-powered motorcycle while touring the Center for Automotive Research at Ohio State University in Columbus, Oh...

President Barack Obama speaks after touring the Center for Automotive Research at Ohio State University in Columbus, Ohio, March, 22, 2012. Obama anou...

President Barack Obama greets the crowd at a pipe yard outside Cushing, Okla., March, 22, 2012. Obama explained his energy policies Thursday at the si...