Staff Sgt. Donterrio Erby, a 455th Expeditionary Aircraft Maintenance Squadron aerospace propulsion technician, shows his unit pride by displaying the “Triple Nickel” sign at Bagram Airfield, Afghanistan, June 16, 2017. Erby is deployed out of Aviano Air Base, Italy, where he performs engine maintenance on F-16 Fighting Falcons assigned to the 555th Expeditionary Fighter Squadron. (U.S. Air Force photo by Staff Sgt. Benjamin Gonsier)