Troops in Kuwait laugh at the comedy of Robin Williams during the USO Holiday Tour, Dec. 18, 2007. The tour host, Chairman of the Joint Chiefs of Staff Navy Adm. Michael G. Mullen, was joined by comedian Lewis Black, seven-time Tour de France champion Lance Armstrong, award-winning recording artist Kid Rock and Miss USA Rachel Smith.

Robin Williams poses for photos with troops assigned to LSA Kuwait during the USO Holiday Tour, Dec. 18, 2007.

Kid Rock plays his set during the 2007 USO Holiday Tour stop at Al Taqaddum, Iraq, Dec. 18, 2007.
Defense Dept. photos by U.S. Navy Petty Officer 1st Class Chad J. McNeeley.