In this photo taken Saturday, Aug. 21, 2010, U.S. Army soldiers from 4th Battalion, 9th Infantry Regiment stand in formation during the casing ceremony for 4th Brigade, 2nd Infantry Division, the last American combat brigade to serve in Iraq, at Camp Virginia, Kuwait. The number of U.S. troops in Iraq has fallen below 50,000 for the first time since the 2003 U.S.-led invasion and ahead of the end-of-the-month deadline mandated by President Barack Obama, the American military said in a statement Tuesday. The number is a watershed _ American forces will no longer conduct combat operations in the country but are instead to train Iraqi troops and help with counter terrorism operations, if asked for by the Iraqis. (AP Photo/Maya Alleruzzo)