A contract plumber connects pipes at the aerospace ground equipment facility April 15, 2013, at Nellis Air Force Base, Nev. The AGE facility will house ground equipment for the F-35A Lightning II. The F-35As at Nellis are owned by the 422nd Test and Evaluation Squadron, part of the 53rd Wing, headquartered at Eglin Air Force Base, Fla. (U.S. Air Force photo by Airman 1st Class Christopher Tam)