When the elevator doors open, a pair of Red Section thugs will freak out and run from you. Let them do just that, and a wall of fire will set them ablaze. Snipe the switch at the far end to extinguish the flames. Go towards the next area, and snap to cover. A gang of troops will assault you. One of them will even drop to your level so deal with him before taking on the stragglers. When they're dead, use the RTL to cross to the next side and get the Galil if you so wish. Climb the ladder and a cutscene will play.