U.S. Army Pfc. Andrew Herring, 128th Aviation Brigade Advanced Individual Training student, identifies parts of a UH-60 Blackhawk’s main rotor at Fort Eustis, Va., June 18, 2015. As future aircraft maintainers, the students must successfully identify individual components of the aircraft’s systems. (U.S. Air Force photo by Staff Sgt. Natasha Stannard/Released)