U.S. Air Force Staff Sgt. Matthew Range, 20th Civil Engineer Squadron electrical systems journeyman, uses his phone to shine light on paperwork following a simulated power outage during operational readiness exercise Weasel Victory 17-07 at Poinsett Electronic Combat Range near Wedgefield, S.C., May 16, 2017. Airmen were required to adapt to changing condition in order to complete the mission. (U.S. Air Force photo by Airman 1st Class Christopher Maldonado)
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