USO TOUR U.S. Navy Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, kicks off the 2009 USO Holiday Tour stop in Kandahar, Afghanistan, Dec. 17, 2009. Mullen and his wife, Deborah, welcomed tennis star Anna Kournikova, comedian Dave Attell, tennis coach Nick BollettierI and musician Billy Ray Cyrus on the tour to visit troops in Afghanistan, Iraq and Germany. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 843557-C-ENY64-331.jpg Photo Gallery