Comedian Robin WIlliams poses for photos with U.S. Air Force airman at al-Asad Airbase in Iraq on Dec. 13, 2010. Williams is one of several entertainers accompanying U.S. Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, during a tour in the Central Command area of responsibility. Comedian Robin WIlliams poses for photos with U.S. Air Force airman at al-Asad Airbase in Iraq on Dec. 13, 2010. Williams is one of several entertainers accompanying U.S. Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, during a tour in the Central Command area of responsibility. SHARE: Download: Full Size (1.29 MB) Tags: Photo Essays Credit: VIRIN: 601898-W-XZW84-933.jpg Photo Gallery