Secretary Gates and Adm. Mike Mullen conduct a joint press conference. Secretary of Defense Robert M. Gates and Chairman of the Joint Chiefs of Staff Adm. Mike Mullen, U.S. Navy, conduct a joint press conference in the Pentagon on July 29, 2010. The leak of many thousands of classified documents on the WikiLeaks website was the chief topic under discussion. SHARE: Download: Full Size (0.05 MB) Credit: VIRIN: 281394-G-SGK83-390.jpg Photo Gallery