Airman 1st Class Chris Stonebrook, 757th Aircraft Maintenance Squadron crew chief, washes the tail of an F-15E Strike Eagle at the wash rack here Sept. 10, 2012, at Nellis Air Force Base, Nev. Washing aircraft every 180 days at Nellis AFB helps to extend its life and reliability by preventing corrosion build-up. The more exposure an installation has to salt water the more frequently the aircraft is required to be washed. Staff Sgt. William )

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Keywords: 757th, air, aircraft, airforce, base, force, maintenance, military, nellis, states, unit, united, usa, washrack