In missle, there is a truck near an entrance to the missle building. get on the hood and crouch, then turn left then right while still crouching. eventualy you will get inside. you can walk around in the truck, and the cool thing is, you can see and shoot out of it, but they cant. just dont throw grenades. and they can shoot your feet. so you should stand behind a wheel. they are the only parts of the truck you can see.