if they do not let you in, you have to break through by force xD, the bazooka is the key, I'm very curious to know what's inside.
by the way I saw a gameplay of this video game and I did not like the camera movement when you collect materials, I felt dizzy just seeing it :S. problems with the FOV maybe.
Yeah, I usually play 3rd person, because I really don't like 1st person play in any game. It really helps a lot :-)