Staff Sgt. Carlos Butriago trains with a Barrett sniper rifle at the Suffolk County firing range in Westhampton Beach, N.Y., on Monday, July 27, 2015. Butriago is a member of the 106th Security Forces Squadron. (Christopher S. Muncy/U.S. Air Force)

Staff Sgt. Fred Frizzell, an 823rd Expeditionary RED HORSE Squadron pavements and construction equipment operator, operates a drilling rig at a well site in Brisas del Mar, Honduras, on Thursday, July 30, 2015. (David J. Murphy/U.S. Air Force)

Airmen from the 8th Security Forces Squadron participate in a shoot, move and communicate drill during a three-day combat readiness training exercise at Kunsan Air Base, South Korea, on Monday, Aug. 3, 2015. (Nick Wilson/U.S. Air Force)

Senior Airman Paul Cauge, a 274th Air Support Operations Squadron joint terminal attack controller, uses a laser rangefinder designator for a close-air support training mission on Wednesday, July 29, 2015, at Grayling Air Gunnery Range in Grayling, Mich., during Northern Strike 2015. (Scott Thompson/U.S. Air Force)

U.S. Air Force Staff Sgt. Andrew Goodrick, left, and Airman 1st Class Jaylen Wilkens, transferred power lines to a new pole by swapping out the cross arm and insulators at the 366th Training Squadron Hotline Training Course at Sheppard Air Force Base, Texas, on Friday, Aug. 7, 2015. (Kyle Gese/U.S. Air Force)

Master Sgt. Jim Vlacich, a machinist with the 106th Rescue Wing Metal Technologies shop, grinds down a section of metal at Francis S. Grabeski Air National Guard Base, N.Y., on Thursday, Aug. 6, 2015. (Christopher Muncy/U.S. Air Force)

Airmen prepare for pull-ups during an Army pre-Ranger physical assessment, on Wednesday, Aug. 5, 2015 at Aviano Air Base, Italy. The assessment included a 5-mile run, push-ups, sit-ups and pull-ups. (Evelyn Chavez/U.S. Air Force)