David Cook, winner of season seven of “American Idol,” addresses the audience during a free concert outside the Dakota’s Club at Ellsworth Air Force Base, S.D., June 3, 2016. Cook has performed for U.S. military personnel in Bahrain, Iran, Iraq, Kuwait, the Persian Gulf and across Europe. (U.S. Air Force photo by Airman 1st Class Denise M. Nevins/Released)