U.S. President George W. Bush is watched by Vice President Dick Cheney during the ceremonial swearing-in of Secretary of Defense Robert Gates at the Pentagon in Arlington, Virginia December 18, 2006. Former CIA Director Robert Gates was officially sworn in as U.S. secretary of defense on Monday, replacing embattled Pentagon chief Donald Rumsfeld, who was under fire for his handling of the Iraq war. REUTERS/Kevin Lamarque (UNITED STATES)