The last convoy of solders from the U.S. Army's 3rd Brigade, 1st Cavalry Division, crosses the border from Iraq into Kuwait on Sunday, Dec. 18, 2011. (AP Photo/Maya Alleruzzo)

Photo by: Maya Alleruzzo

The last convoy of solders from the U.S. Army's 3rd Brigade, 1st Cavalry Division, crosses the border from Iraq into Kuwait on Sunday, Dec. 18, 2011. (AP Photo/Maya Alleruzzo)