Third Combat Engineer Battalion detonates an Improvised directional flame thrower during training at 1st Marine Division's field exercise, Desert Scimitar 2014, aboard Marine Corps Air Ground Combat Center Twentynine Palms, Calif., May 13, 2014. The flame thrower used is called Fougasse, and was created by the combat engineers by combining 55 gallons of JP8 and sticks of C-4. In this design, detonating cord is used to rupture the container immediately before triggering the propelling charge. In order to guarantee ignition, the improvised devices frequently feature two explosive charges, one to throw and the other to ignite the fuel. (U.S. Marine Corps photograph by Cpl. Robert J. Reeves/RELEASED)