Defenders compete in Global Strike Challenge
Staff Sgt. Samuel Saintz, 620th Ground Combat Training Squadron formal training instructor, scurries through a facility to get into a fighting position during the 2017 Global Strike Challenge at Camp Guernsey, Wyo., May 18, 2017. The winners from each challenge will be announced in August at the 2017 Global Strike Command Innovation and Technology Symposium in Shreveport, La. (U.S. Air Force photo by Staff Sgt. Christopher Ruano)

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Photo by: Staff Sgt. Christopher Ruano |  VIRIN: 170518-F-VS255-1027.JPG