Marines with Bravo Battery, 1st Battalion, 12th Marine Regiment, wait for the call to fire an M777 howitzer during a dual-fire exercise at Schofield Barracks, Hawaii, Nov. 13, 2013. The dual-fire exercise included shooting M327 Towed-Rifled Mortar Systems alongside the M777s during the two-day training exercise. (U.S. Marine Corps photo by Lance Cpl. Matthew Bragg) - Marines with Bravo Battery, 1st Battalion, 12th Marine Regiment, wait for the call to fire an M777 howitzer during a dual-fire exercise at Schofield Barracks, Hawaii, Nov. 13, 2013. The dual-fire exercise included shooting M327 Towed-Rifled Mortar Systems alongside the M777s during the two-day training exercise. (U.S. Marine Corps photo by Lance Cpl. Matthew Bragg)