U.S. Air Force civilians Lonnie Thomas and Andrew Bakios, 567th Aerospace Maintenance and Regeneration Squadron perform maintenance on one of six fuel tanks on the QF-16 at the 309th Aerospace Maintenance and Regeneration Group at Davis-Monthan Air Force Base, Ariz., July 9, 2013. The "Q" designation in the aircraft's name signifies that the aircraft is a drone. (U.S. Air Force photo by Senior Airman Christine Griffiths/Released)