Secretary Gates and Adm. Mike Mullen hold a joint Pentagon press conference. Secretary of Defense Robert M. Gates and Chairman of the Joint Chiefs of Staff Adm. Mike Mullen hold a joint Pentagon press conference to discuss the resignation of Gen. Stanley A. McChrystal on June 24, 2010. SHARE IMAGE: Download Image: Full Size (0.03 MB) Photo By: VIRIN: 433073-F-DAS38-384.jpg Photo Gallery