Marines with Company C, 2nd Combat Engineer Battalion, Regimental Combat Team 1, search for improvised explosive devices in the streets of Karma, Iraq, during a night operation July 23. Engineers use mine resistant vehicles called “Buffalos” to search out roads for IEDs. - Marines with Company C, 2nd Combat Engineer Battalion, Regimental Combat Team 1, search for improvised explosive devices in the streets of Karma, Iraq, during a night operation July 23. Engineers use mine resistant vehicles called “Buffalos” to search out roads for IEDs.