U.S. Navy Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, and U.S. Marine Corps Gen. James N. Mattis, commander, U.S. Central Command, share a laugh before the International Security Assistance Force change-of-command ceremony in Kabul, Afghanistan, July 18, 2011. U.S. Navy Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, and U.S. Marine Corps Gen. James N. Mattis, commander, U.S. Central Command, share a laugh before the International Security Assistance Force change-of-command ceremony in Kabul, Afghanistan, July 18, 2011. SHARE: Download: Full Size (3.41 MB) Tags: Photo Essays Credit: VIRIN: 214659-G-TBP64-572.jpg Photo Gallery