Company B secures the perimeter as a simulated Improvised Explosive Device goes off May 1 aboard Edson Range, Weapons Field Training Battalion, Marine Base Camp Pendelton. IED lane was one of the many obstacles Co. B overcame while at the Crucible. During the lane recruits had to patrol for possible simulated IED's. - Company B secures the perimeter as a simulated Improvised Explosive Device goes off May 1 aboard Edson Range, Weapons Field Training Battalion, Marine Base Camp Pendelton. IED lane was one of the many obstacles Co. B overcame while at the Crucible. During the lane recruits had to patrol for possible simulated IED's.