Chairman of the Joint Chiefs of Staff Gen. Martin E. Dempsey, country music artist Kellie Pickler, retired Chicago Bear middle linebacker Brian Urlacher, actress Dianna Agron, Gen Martin Dempsey, comedian Rob Riggle, actress Meghan Markle and Washington Nationals pitcher finish a USO show in Vicenza, Italy, Dec. 7, 2014. (DOD photo by D. Myles Cullen/Released)