** FILE ** Vice President Joseph R. Biden (second from left) meets in Baghdad on Monday, Aug. 30, 2010, with (from left) Gen. Raymond T. Odierno, the outgoing U.S. commander in Iraq; U.S. Ambassador to Iraq James Jeffrey; Marine Gen. James Mattis, head of U.S. Central Command; and Lt. Gen. Lloyd Austin, the incoming commander of U.S. forces in Iraq. The change of command ceremony was held Wednesday. (AP Photo/Hadi Mizban)

Photo by: Hadi Mizban

** FILE ** Vice President Joseph R. Biden (second from left) meets in Baghdad on Monday, Aug. 30, 2010, with (from left) Gen. Raymond T. Odierno, the outgoing U.S. commander in Iraq; U.S. Ambassador to Iraq James Jeffrey; Marine Gen. James Mattis, head of U.S. Central Command; and Lt. Gen. Lloyd Austin, the incoming commander of U.S. forces in Iraq. The change of command ceremony was held Wednesday. (AP Photo/Hadi Mizban)