Photos

A Sapper Leadership Course student charges a CD 450-J ignition device during rehearsal for the urban demolition range, July 24, 2013. The device, also called a “j-box,” is a lightweight, battery-operated blasting device that the combat engineers used during urban demolition. The device requires a Marine to hold a “charge” button and count-off loudly until the “ready to fire” indicator lights up. At that moment, the breacher will push the “fire” button, igniting the explosion.