Adm. Mike Mullen explains to reporters. Chairman of the Joint Chiefs of Staff Adm. Mike Mullen, U.S. Navy, explains to reporters the extraordinary restraint shown by American combat forces in Afghanistan in order to prevent civilian casualties during a joint press briefing in the Pentagon with Secretary of Defense Robert M. Gates (left) on July 20, 2009. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 819111-B-ATC71-069.jpg Photo Gallery