Nakubaliana na wewe, haswa ukichukulia kwamba all we've been hearing so far is only one side of the story - namely the American Authorities's day-by-day different versions of what really went down that night.
Kusema kweli (Plastic toy guns next to cold dead bodies aside), these Al Qaeda dudes surely didn't go out laying down on their beds as the latest US propaganda will have it (i.e., The White House's latest claim that OBL wasn't armed and didn't offer any resistance).
I have good reason to believe that, that helicopter was possibly shot down, because elsewhere we can read that: