Master Sgt. Martin Siler, 7th Expeditionary Airborne Command and Control Squadron joint surveillance target attack radar systems flight engineer, conducts a pre-flight inspection on an E-8C Joint Surveillance Target Attack Radar Systems prior to takeoff June 8, 2016, at Al Udeid Air Base, Qatar. 7th EACCS aircrew and 7th Air Mobility Unit crew chiefs perform interior and exterior pre-flight inspections prior to every takeoff to ensure the safety of the crew flying and the mission. (U.S. Air Force photo/Senior Airman Janelle Patiño/Released)