The driver turned his truck onto an access road leading to the compound. He drove into and circled the parking lot, and then he accelerated to crash through a 5-foot-high barrier of concertina wire separating the parking lot from the building. The wire popped "like somebody walking on twigs."[37] The truck then passed between two sentry posts and through an open vehicle gate in the perimeter chain-link fence, crashed through a guard shack in front of the building and smashed into the lobby of the building serving as the barracks for the 1st Battalion 8th Marines (BLT).