U.S. President George W. Bush speaks before U.S. Secretary of Defense Robert Gates (bottom row, R) participates in a swearing-in ceremony at the Pentagon in Washington 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/Larry Downing (UNITED STATES)