SWEARING IN Defense Secretary Robert M. Gates administers the oath of office to Deputy Secretary of Defense William Lynn III as his wife Mary Murphy holds the bible during a welcoming ceremony for Lynn at the Pentagon, March 30, 2009. Lynn is the 30th deputy secretary of defense. SHARE IMAGE: Download Image: Full Size (0.07 MB) Photo By: VIRIN: 155279-G-FZP02-885.jpg Photo Gallery