“They won’t,” Martin interrupted. “We’ll keep them out.” He locked the control room door, engaging the reinforced latches. “This door will hold as long as they don’t have anything to blast through it.”
The sound of pounding footsteps on the roof sent a chill through the room. The leader of the thieves dropped down onto the small exterior walkway just outside the control room. The door rattled violently as the leader struck it with the crowbar.