Airmen compete for ‘Alpha’ status
U.S. Air Force Staff Sgt. Zachary Herrera, 20th Civil Engineer Squadron explosive ordnance disposal journeyman, performs a slanted ladder climb, otherwise known as the devil steps, on a battle rig during an Alpha Warrior Air Force Tour competition at Shaw Air Force Base, S.C., Aug. 2, 2017. The rig tested the participant’s strength and endurance by challenging different muscle groups across varying stations. (U.S. Air Force photo by Senior Airman Christopher Maldonado)