SHOW INTRO U.S. Navy Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, and his wife, Deborah, introduce performers during the USO holiday tour on Bagram Airfield, Afghanistan, Dec. 15, 2010. SHARE IMAGE: Download Image: Full Size (0.08 MB) Photo By: VIRIN: 283512-Q-PQX37-196.jpg Photo Gallery