You look around the base for another way up, and notice a pipe system going all the way up. You follow the pipes down to the basement, and find out that these are the cooling pipes for the base.You look around until you find and open a little hatch in the wall. You turn on your flashlight and look up. You see the cooling pipes go up, as well as some ladder steps going up. You aren't sure where this goes, but you climb up anyway, as it is your only hope. As you climb up, you realize the hatch at the end of where the ladder ends, is right behind the guards of the safe. You quietly get out and stun the guards, and use their keycards to get inside the safe. Unfortunatley, the alarm goes off.