Troop Greetings U.S. Marine Corps Gen. Joseph F. Dunford Jr., chairman of the Joint Chiefs of Staff, talks with U.S. service members after a USO show at Bagram Airbase, Afghanistan, Dec. 8, 2015. Dunford is traveling with USO entertainers to visit deployed service members on three continents during the holidays. DoD photo by D. Myles Cullen SHARE IMAGE: Download Image: Full Size (0.47 MB) Tags: Lead Photos, Joseph F. Dunford, USO , All images, Bagram, CJCS, Afghanistan Photo By: D. Myles Cullen VIRIN: 151208-D-VO565-086.JPG Photo Gallery