Senior Airman Jeremy Houser gives parking directions to F-35 Lightning II pilot Col. Stephen Jost, the 33rd Operations Group commander, during a quick-turn hot pit refueling mission June 20, 2013, at Eglin Air Force Base, Fla. Both Airmen are assigned to the 33rd Fighter Wing and are part of the testing program for the fifth generation fighter. Houser is an F-35 Lightning II joint strike fighter crewchief assigned to the 33rd Maintenance Group.