Comedian Dave Attell and tennis star Anna Kournikova perform during the 2009 USO Holiday Tour stop in Kandahar, Afghanistan, Dec. 18, 2009. U.S. Navy Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, and his wife, Deborah, welcomed tennis coach Nicholas Bollettieri and musician Billy Ray Cyrus on the tour visiting troops in Afghanistan, Iraq and Germany. Comedian Dave Attell and tennis star Anna Kournikova perform during the 2009 USO Holiday Tour stop in Kandahar, Afghanistan, Dec. 18, 2009. U.S. Navy Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, and his wife, Deborah, welcomed tennis coach Nicholas Bollettieri and musician Billy Ray Cyrus on the tour visiting troops in Afghanistan, Iraq and Germany. SHARE: Download: Full Size (1.04 MB) Tags: Photo Essays Credit: VIRIN: 333752-A-CIE33-454.jpg Photo Gallery