2nd Lt. Michael McCrary, 10th Missile Squadron deputy missile combat crew commander, closes an emergency shut off valve in the missile procedures trainer during a training session at Malmstrom Air Force Base, Mont., Sept. 24. For the past month, missileers from the 10th, 12th and 490th Missile Squadrons have been constantly preparing for the 2014 Global strike Challenge. (U.S. Air Force photo/Airman 1st Class Collin Schmidt)

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