Senior Master Sgt. Mike West, 23rd Special Tactics Squadron operations superintendent, directs his team during a Monster Mash challenge at Hurlburt Field, Fla., June 28, 2013. This particular Mash involved about seven miles of running, more than five of which included a 50-pound rucksack. There was a memory test, a litter carry involving a simulated casualty, a shooting event, a series of 5-gallon jerry can carries, several skills stations, and a zodiac boat movement with a limited number of paddles. (U.S. Air Force photo by Capt. Belena S. Marquez/Released)