Staff Sgt. Ryan Oliver inspects the rotor on a UH-1N Iroquois Jan. 27, 2015, on Malmstrom Air Force Base, Mont. Oliver completes a preflight inspection prior to each flight to ensure there are no mechanical faults in the aircraft. Oliver is a 40th Helicopter Squadron special missions aviator. (U.S. Air Force photo/Airman 1st Class Dillon Johnston)
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