Tech. Sgt. Dean Criswell, 22nd Special Tactics Squadron pararescueman, explains to Boy Scouts from Troop 007 on how to put on a climbing harness, April 18, 2015, at Joint Base Lewis-McChord, Wash. The boy scouts had to learn how to put on a harness, repel, tie specific knots, and give verbal signals to earn their climbing merit badges. (U.S. Air Force photo/Airman 1st Class Keoni Chavarria)
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