Chairman Conversation U.S. Marine Corps Gen. Joseph F. Dunford Jr., chairman of the Joint Chiefs of Staff, talks with U.S. sailors on Naval Air Station Sigonella, Italy, Dec. 5, 2015. Dunford is traveling with entertainers to visit deployed U.S. service members during the 2015 USO Holiday Tour. DoD photo by D. Myles Cullen SHARE: Download: Full Size (1.62 MB) Credit: D. Myles Cullen VIRIN: 151205-D-VO565-015.JPG Photo Gallery