Charlie Riedel/AP PhotoIn this May 29, 2011 file photo, Joplin residents Paula Barnett, left, and Susan Dodson console each other during a memorial service marking the one week anniversary of an EF-5 tornado which ripped a six mile long path of destruction through Joplin and killed at least 139 people.
Christopher Smith/AP PhotoIn this Feb. 1, 2011 file photo, Tim Houchin walks in the snow to work downtown in Tulsa, Okla.
Sandy Macys/AP PhotoIn this Aug. 28, 2011 file photo, a person searches for anyone who may be occupying the building as raging flood waters from Tropical Storm Irene cross Route 100, closing the main road to traffic in Waitsfield, Vt.
Pete Souza/AP PhotoIn this May 1, 2011 file image released by the White House and digitally altered by the source to diffuse the paper in front of Secretary of State Hillary Rodham Clinton, President Barack Obama and Vice President Joe Biden, along with with members of the national security team, receive an update on the mission against Osama bin Laden in the Situation Room of the White House in Washington.
David Goldman/AP PhotoIn this Oct. 26, 2011 file photo, a protestor of the Occupy Atlanta demonstration is arrested after refusing to leave after Mayor Kasim Reed revoked his executive order allowing the protestors to camp out in Woodruff Park in Atlanta.
Robert F. Bukaty/AP PhotoIn this July 21, 2011 file photo, William Dyer, Jr., of Gortham, Maine stays cool seated on his beach chair waist-deep in Sabbathday Lake in New Gloucester, Maine.
Jeff Roberson/AP PhotoIn this May 23, 2011 file photo, Meghan Miller stands in the middle of a destroyed neighborhood as she checks on her sister-in-law's home in Joplin , Mo.
Greg Lindstrom/AP PhotoIn this Dec. 8, 2011 file photo, Gwen Williams of Norton Shores listens to speakers outside Rep. Bill Huizenga's Muskegon, Mich. office during a rally calling to extend unemployment insurance benefits, which are set to expire on Dec. 31.
Andrew Burton/AP PhotoIn this Oct. 14, 2011 file photo, a man affiliated with the Occupy Wall Street protests tackles a police officer during a march towards Wall Street in New York. The official cleanup of a plaza in lower Manhattan where protesters have been camped out for a month was postponed early Friday, sending up cheers from a crowd that had scrambled to scrub the park on its own out of fear the effort was merely a pretext to evict them.
M. Spencer Green/AP PhotoIn this Aug. 8, 2011 file photo, trader Andrew Stavros reacts after the close of trading in the NASDAQ, 100 Index pit, on the floor of The CME Group in Chicago. Stocks plummeted at the close after anxiety overtook investors on the first trading day since Standard & Poor's downgraded American debt.
Matt Rourke/AP PhotoIn this Wednesday, Nov. 9, 2011 file photo, Penn State football coach Joe Paterno arrives home in State College, Pa. Paterno was fired in the aftermath of child sex-abuse charges against former defensive coordinator Jerry Sandusky, who maintains his innocence.
Wayne Tilcock/AP PhotoIn this Nov. 18, 2011 file photo, University of California, Davis Police Lt. John Pike uses pepper spray to move Occupy UC Davis protesters while blocking their exit from the school's quad in Davis, Calif. Pike, the riot-clad police officer who pepper sprayed a row of peaceful Occupy Wall Street protesters at a California university, is a retired U.S. Marine sergeant twice honored for his police work on campus.
Jessica Hill/AP PhotoIn this Jan. 27, 2011 file photo, a flag pokes above the snow around mounds of covered grave markers in Veterans Memorial Field in East Hartford, Conn., after another winter storm.
Kiichiro Sato/AP PhotoIn this Feb. 2, 2011 file photo, hundreds of cars are seen stranded on lake Shore drive in Chicago. A winter blizzard of historic proportions wobbled an otherwise snow-tough Chicago, stranding hundreds of drivers for up to 12 hours overnight on the city's showcase lakeshore thoroughfare and giving many city schoolchildren their first ever snow day.