Master Sgt. Christopher Miller, RQ-4 Block 40 Global Hawk maintenance instructor with the 372nd Training Squadron, teaches maintainers with the 69th Reconnaissance Group to be proficient and knowledgeable on the Global Hawk Sept. 17, 2014, on Grand Forks Air Force Base, N.D. Miller was selected as the base's Warrior of the Week for the third week in September. (U.S. Air Force photo/Airman 1st Class Bonnie Grantham)
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