Go to the right a little bit and watch the nice explosion. Then head back the other way towards the weapons research and dev section. Go
through the door with a scanner and follow the hallway to the right. Head forwards to the research section. I recommend stocking up on weapons. Go to the left and head to the armory/firing range. The door on the left is the firing range and the door on the right is the
armory. Clear out the armory and pick up a ton of ammo/health/armor. Then head back down the hallway and onto section 2-C. If you want head through the hand scanner door and kill some more bad guys, otherwise just keep going down the hallway and use the elevator to exit the level.
