Walk and Talk Marine Corps Gen. Joe Dunford, chairman of the Joint Chiefs of Staff, speaks with his senior enlisted advisor, Army Command Sgt. Maj. John W. Troxell, after a visit to Train, Advise, Assist Command in Helmand province, Afghanistan, June 28, 2017. DoD photo by Army Sgt. James K. McCann SHARE IMAGE: Download Image: Full Size (0.48 MB) Tags: Travels , Chairman, Joint Chiefs, Joe Dunford, Afghanistan , MARINE CORPS, MARINES Photo By: Sgt. James K. McCann VIRIN: 170628-D-SW162-1317.JPG Photo Gallery