SHARING A LAUGH Defense Secretary Leon E. Panetta interjects a light comment at a press conference during which President Barack Obama announced his nomination of Chuck Hagel as the next defense secretary at the White House, Jan. 7, 2013. Hagel, 66, a former U.S. senator from Nebraska, earned two Purple Hearts as an infantry squad leader during the Vietnam War. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 767451-D-POL22-591.jpg Photo Gallery