A Marine from Golf Battery, 2nd Battalion, 10th Marine Regiment, screws on fuses to high explosive 155mm rounds during a training exercise aboard Marine Corps Base Camp Lejeune, N.C., June 26, 2013. A single 155 mm round weighs 90 pounds and can be launched out of a canon more than 30,000 meters. - A Marine from Golf Battery, 2nd Battalion, 10th Marine Regiment, screws on fuses to high explosive 155mm rounds during a training exercise aboard Marine Corps Base Camp Lejeune, N.C., June 26, 2013. A single 155 mm round weighs 90 pounds and can be launched out of a canon more than 30,000 meters.