U.S. Army Sgt. Reginald Mankowski, left, performs a gunner's quadrant micrometer test during the Guns of Glory top gun competition on Forward Operating Base Gardez in Khost province, Afghanistan, Sept. 7, 2013. Mankowski is assigned to the 101st Airborne Division's Bravo Battery, 4th Battalion, 320th Field Artillery Regiment, 4th Brigade Combat Team. U.S. Army Sgt. Reginald Mankowski, left, performs a gunner's quadrant micrometer test during the Guns of Glory top gun competition on Forward Operating Base Gardez in Khost province, Afghanistan, Sept. 7, 2013. Mankowski is assigned to the 101st Airborne Division's Bravo Battery, 4th Battalion, 320th Field Artillery Regiment, 4th Brigade Combat Team. SHARE: Download: Full Size (2.06 MB) Tags: Photo Essays Credit: VIRIN: 761167-H-OOV29-258.jpg Photo Gallery