Army Capt. Aston Armstrong is posted in a clearing to help guard a perimeter as the platoon breaks for a meal during a training mission. The Massachusetts native graduated from the U.S. Military Academy in 2008 and sought to earn a coveted sapper badge. (Rod Lamkey Jr./The Washington Times)

Army Capt. Aston Armstrong is posted in a clearing to help guard a perimeter as the platoon breaks for a meal during a training mission. The Massachusetts native graduated from the U.S. Military Academy in 2008 and sought to earn a coveted sapper badge. (Rod Lamkey Jr./The Washington Times)