U.S. Air Force Gen. Hawk Carlisle, commander of Air Combat Command, listens to Master Sgt. Juan Trujillo, 1st Maintenance Squadron jet engine intermediate maintenance shop non-commissioned officer in charge, detail the shop’s role within the 1st Fighter Wing during an installation-wide tour at Langley Air Force Base, Va., March 13, 2015. Throughout the day, Carlisle visited units across Joint Base Langley-Eustis to see its diverse missions firsthand. (U.S. Air Force photo by Senior Airman R. Alex Durbin/Released)