U.S. Air Force Staff Sgt. Aaron Vanley, 633rd Security Forces Squadron unit trainer, lists off a series of items during the National Police Week Defenders’ Challenge at Joint Base Langley-Eustis, Virginia, May 16, 2018. Individuals were tasked to memorize specific items at the beginning of the event and had to list as many as they could after they completed the course. (U.S. Air Force photo by Airman 1st Class Tristan Biese)
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