COUNTRY CHORDS Country music artist Kix Brooks performs at the USO holiday tour show on Camp Victory, Iraq, Dec. 13, 2010. U.S. Navy Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, and his wife, Deborah, are hosting the holiday tour featuring Brooks, Robin Williams, Lewis Black, Kathleen Madigan and Tour de France champion Lance Armstrong in the Central Command area of responsibility. SHARE: Download: Full Size (0.05 MB) Credit: VIRIN: 129158-N-ZEW35-487.jpg Photo Gallery