exercise Army Command Sgt. Maj. John Wayne Troxell, the senior enlisted advisor to the chairman of the Joint Chiefs of Staff, leads an intense, early morning workout session at Resolute Support headquarters in Kabul, Afghanistan, July 17, 2016. DoD photo by Lisa Ferdinando SHARE IMAGE: Download Image: Full Size (0.17 MB) Tags: Army Command Sgt. Maj. John Wayne Troxell, Marine Corps Gen. Joe Dunford Photo By: Army VIRIN: 160717-D-BN624-003.JPG Photo Gallery