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U.S. Marine Corps Cpl. Laren Kenison, a powerline mechanic with Marine Attack Squadron (VMFA) 121, prepares to fuel an F-35B Lightning II while wearing Mission Oriented Protective Posture gear level four during a training exercise at Marine Corps Air Station Iwakuni, Japan, Nov. 15, 2017. The exercise trains Marines to keep aircraft in the fight while working inside a simulated-hazardous environment, and itenables Marines to refine their standard operating procedures while familiarizing them to operate in gear they aren’t used to.