Go tot the 12t and Fig. level. Wait for the airplane to drop bombs on the street. Go into the building by the caution tape. Inside, go down the stairs and make a left. Go through the door by the two metro signs. Make a right and at the "T" intersection, make another right and follow the path til you get to the long hallway. Gas should be leaking out of the pipes. When the enemies come through te hallway, shoot the pipes. It will explode and there will be a great big fireball. Run!!! You can kill your enemies, but yourself too!! Run around the corner to get to saftey.