U.S. Service members listen to U.S. Air Force Chief Master Sgt. Mark Hurst, 633rd Air Base Wing command chief, speak during a first sergeants seminar at Langley Air Force Base, Va., May 8, 2015. At the end of the ceremony, all the participants received a certificate of completion as a token of the week-long training designed to give aspiring first sergeants the chance to learn the roles and responsibilities. (U.S. Air Force photo by Senior Airman Breonna Veal/Released)