A U.S. Marine attached to Weapons Company, 1st Battalion, 3rd Marine Regiment - "The Lava Dogs" fires a Mk19 Grenade Launcher at an enemy tank during Lava Viper aboard Pohakuloa Training Area, Hi., May 29, 2015. Marines of Weapon Company train on anti-armor procedures while at Lava Viper. (U.S. Marine Corps photo by Cpl. Ricky S. Gomez/Released)