Incoming Chairman of the Joint Chiefs of Staff U.S. Marine Gen. Peter Pace (R) smiles next to U.S. President George W. Bush (L) as Secretary of Defense Donald Rumsfeld watches after being sworn in by outgoing Chairman of the Joint Chiefs of Staff U.S.A.F. Gen. Richard Myers at Summerall Field at Ft. Myer in Arlington, Virginia September 30, 2005. Myers ended four years as the top U.S. military officer on Friday with a warning that pulling out of Iraq would only make the United States more vulnerable. REUTERS/Larry Downing