U.S. Army Sgt. Armando Aquino a combat engineer assigned

U.S. Army Sgt. Armando Aquino a combat engineer assigned to the 65th Brigade Engineer Battalion (BEB), 2nd Brigade Combat Team, 25th Infantry Division, Schofield Barracks, Hawaii, provides security for his unit before entering an underground tunnel, July 27, 2017, at Muscatatuck Urban Training Center, Ind. The 65th BEB, stationed at Schofield Barracks, Hawaii, is practicing urban combat operations in southern Indiana for two weeks.. (U.S. Army Reserve photo by Sgt. Carlos J. Garcia)