Iraqi security forces inspect a crater caused by a car bomb attack in the neighborhood of Karrada in Baghdad earlier today (Dec. 22, 2011). It was one in a wave of such bombings in the Iraqi capital today. Hadi Mizban/AP hide caption

itoggle caption Hadi Mizban/AP

The American flag, Iraqi flag, and the U.S. Forces Iraq colors are carried during ceremonies in Baghdad today marking the end of the U.S. military mission in Iraq. Pablo Martinez Monsivais/pool/AP hide caption

itoggle caption Pablo Martinez Monsivais/pool/AP

Vice President Joe Biden is interviewed by NPR's Robert Siegel in the Secretary of War Suite of the Eisenhower Executive Office Building, Dec. 13. David Lienemann/The White House hide caption

itoggle caption David Lienemann/The White House

A U.S. marine watches a statue of Saddam Hussein being toppled in Firdaus Square, in downtown Baghdad, on April 9, 2003. Jerome Delay /AP hide caption

itoggle caption Jerome Delay /AP