David Cook, center, winner of season seven of American Idol, performs a free concert for Airmen and their families at the Dakota’s Club at Ellsworth Air Force Base, S.D., June 3, 2016. Cook said his tour was a way for him and his band to show their appreciation to U.S. servicemembers for the sacrifices they make. (U.S. Air Force photo by Airman 1st Class Denise M. Nevins/Released)