SWEARING-IN Vice President Joe Biden administers the oath of office to Defense Secretary Leon E. Panetta, accompanied by his wife Sylvia, during a formal ceremony at the Pentagon, July 22, 2011. The former CIA director took over as the 23rd secretary of defense after a private swearing-in ceremony, July 1, 2011. SHARE IMAGE: Download Image: Full Size (0.07 MB) Photo By: VIRIN: 778060-W-OPA94-560.jpg Photo Gallery