Marine AT-4

U.S. Marine Corps Sgt. Donald Bowley, left, an assistant section leader, supervises Lance Cpl. Jonathan Ruark, a machine gunner, both with Weapons Platoon, Lima Company, 3rd Battalion, 3rd Marine Regiment, Marine Rotational Force-Darwin, as Ruark fires an AT4 antitank grenade launcher during a training exercise at Kangaroo Flats Training Area in Northern Territory, Australia, May 22, 2013. (DoD photo by Sgt. Sarah Fiocco, U.S. Marine Corps/Released)

U.S. Marine Corps Sgt. Donald Bowley, left, an assistant section leader, supervises Lance Cpl. Jonathan Ruark, a machine gunner, both with Weapons Platoon, Lima Company, 3rd Battalion, 3rd Marine Regiment, Marine Rotational Force-Darwin, as Ruark fires an AT4 antitank grenade launcher during a training exercise at Kangaroo Flats Training Area in Northern Territory, Australia, May 22, 2013. (DoD photo by Sgt. Sarah Fiocco, U.S. Marine Corps/Released)