Low-crawling Air Force Capt. Kaci Dixon and a group of combat controllers crawl through sand while moving a 90-pound kettlebell at Yale Reservoir, Wash., in August 2015. They were participating in a 125th Special Tactics Squadron training exercise. Courtesy photo SHARE IMAGE: Download Image: Full Size (0.22 MB) Photo By: Courtesy photo VIRIN: 170831-F-XX000-1005A.JPG Photo Gallery