Call Of Duty Black Ops Trailer

Here’s the new teaser trailer for Call of Duty: Black Ops.  The trailer is exactly just that a teaser, we really don’t get to see much just enough to get us wondering what the story will entail.  A couple of scenes look like they may be in Vietnam, but who do they have to bring back?  I have played it over a couple of times and you see what looks to be a astronaut and towards the end you hear them say we have to bring him back as the heart monitor make the sound of a heart stopping.  Throughout the trailer  narrative they seem to be talking about the same person, but who is it?  Let us know what you think.