Just going by the posters for the movie which depict swat teams hanging off the helos in question and flying over the arch de triomphe.
I am intrigued by Jackonickos post - I never saw anything resembling a Jet Ranger or a H5oo in my year there and as I said above I'd be very very surprised if they were present. It's hard to operate from an airfield for so long and not know what's on it. Jacko, perhaps you have more info - where were they based? Not Mogadishu airport, I'll bet. Baledogle perhaps? They must have been very rare visitors to Mog indeed. Certainly none of the accounts I have read about the incident refers to either type.
Orions, well they are obviously much more covert than I had imagined - high level evidently, but why not base them locally if they are needed like everything else?