Lance Cpl Frank Delawder, a gunner with Echo Battery, 2nd Battalion, 10th Marine Regiment, 2nd Marine Division, looks through the sight of an M-137 Panoramic Telescope attached to the M-777 lightweight 155mm howitzer in order to ensure proper aim before firing as part of a Top Gun competition held at Fort Bragg, N.C., May 6, 2014. Top gun is the main event in Rolling Thunder, a field operation in which each battery from 10th Marines comes together to train and compete for the title Top Gun.