Airmen with the 319th Security Forces Squadron, U.S. Customs and Border Protection agents, and officers with the Grand Forks Sheriff’s Department gather to discuss a plan of entry during a training exercise at Carl Ben Eielson Elementary School Aug. 9, 2017, on Grand Forks Air Force Base, N.D. The USCBP led the three-day event, providing classroom and hands-on training dealing with a variety of active-shooter scenarios. (U.S. Air Force photo by Airman 1st Class Elora J. Martinez)
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