U.S. Marine Corps Gen. Joseph F. Dunford Jr., chairman of the Joint Chiefs of Staff, and his wife, Ellyn Dunford, talk with U.S. service members and their families after a USO show on Naval Air Station Sigonella, Italy, Dec. 5, 2015. The chairman is visiting U.S. service members deployed overseas while bringing the 2015 USO Entertainment Troupe on a holiday tour to perform for U.S. troops in Europe, Africa and Asia. DoD photo by D. Myles Cullen