An Anniston Army Depot employee unscrews a wheel on an assault breaching vehicle belonging to 2nd Combat Engineer Battalion, 2nd Marine Division, in order to upgrade the vehicle aboard Marine Corps Base Camp Lejeune, Sept. 5, 2013. The tracks and wheels needed to be removed to upgrade the body frame of the vehicle with improved suspension. - An Anniston Army Depot employee unscrews a wheel on an assault breaching vehicle belonging to 2nd Combat Engineer Battalion, 2nd Marine Division, in order to upgrade the vehicle aboard Marine Corps Base Camp Lejeune, Sept. 5, 2013. The tracks and wheels needed to be removed to upgrade the body frame of the vehicle with improved suspension.