A U.S Marine rappels down a cliff during Mountain Exercise 2014, aboard Marine Corps Mountain Warfare Training Center in Bridgeport, Calif., Aug. 29, 2014.
Tactical air control party specialists with the 169th Air Support Operations Squadron fire their M4 carbines during a shoot-and-move course at Operation Northern Strike in Alpena, Mich., Aug. 15, 2014.
Marines with Bravo Company, 1st Battalion, 7th Marine Regiment during a mission in Helmand province, Afghanistan, Aug. 16, 2014.
The Norwegian Police Advisory Team in the Nordic Baltic Transitional Support Unit conducting a medical exercise in Afghanistan. August 3, 2013
Pro-Russian rebels in Donetsk, Ukraine.
Marines with the 22nd Marine Expeditionary Unit fires at targets during a combat marksmanship training exercise aboard USS Bataan, April 22, 2011.
A British Sniper in an overwatch position from a compound in Helmand Province, Afghanistan.
British Royal Military Police reservists providing Close Protection in Afghanistan, 2013.
Israeli Defense Force AH-1 Cobra and AH-64 Apache.
German Fallschirmjäger K9 unit apprehending a suspicious target during an exercise. July 17, 2014.
U.S and ROK Marines conducting a joint exercise. June, 2014.