CJCS at Aspen Security Forum Marine Corps Gen. Joe Dunford, chairman of the Joint Chiefs of Staff, answers a question during a discussion moderated by Andrea Mitchell, chief foreign affairs correspondent for NBC News, at the 2017 Aspen Security Forum in Aspen, Colo., July 22, 2017. DoD photo by Army Sgt. James K. McCann SHARE IMAGE: Download Image: Full Size (0.31 MB) Tags: Aspen Security Forum, CJCS, Joe Dunford, MARINE CORPS, MARINES Photo By: Sgt. James K. McCann VIRIN: 170722-D-SW162-1072.JPG Photo Gallery