Adm. Mike Mullen is briefed by Col. Terry Sellers and Command Sgt. Maj. Chris Hardy. Chairman of the Joint Chiefs of Staff Adm. Mike Mullen is briefed by U.S. Army Col. Terry Sellers and Command Sgt. Maj. Chris Hardy during an aerial tour of Fort Benning, Ga., on June 4, 2010. SHARE: Download: Full Size (0.07 MB) Credit: VIRIN: 516561-X-WPX61-315.jpg Photo Gallery