Robert M. Gates reviews his notes as he walks down the hall with his son Bradley R. Gates just minutes before he is administered the oath of office as the 22nd secretary of defense by Vice President Dick Cheney during a ceremony at the Pentagon, Dec. 18, 2006. Robert M. Gates reviews his notes as he walks down the hall with his son Bradley R. Gates just minutes before he is administered the oath of office as the 22nd secretary of defense by Vice President Dick Cheney during a ceremony at the Pentagon, Dec. 18, 2006. SHARE: Download: Full Size (1.98 MB) Tags: Photo Essays Credit: VIRIN: 057342-H-WLA43-736.jpg Photo Gallery