Tech. Sgt. Dennis Hertlein, 57th Aircraft Maintenance Squadron Viper Aircraft Maintenance Unit specialist expediter, poses in front of an F-16 Fighting Falcon at Nellis Air Force Base, Nev., April 17, 2015. Hertlein’s expertise has helped save the Air Force $5 million by completing modifications and upgrades at Nellis AFB, rather than sending them off to a depot. (U.S. Air Force photo by Airman 1st Class Mikaley Towle)
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