How about getting an interview with one of the crew members. My take some doing but it may turn out to be worthwhile.
If something was going on as many speculate - it was at the least rated Secret and more likely something above Top Secret CW. No one will talk, even if you found them. So not in their lifetime - maybe on their death beds decades from now, but that is no guarantee. Maybe in the NYSlimes or some reporter will leak, is the best you could hope for ... and that would likely raise more questions than answers.
Note to all crew members:
Do not volunteer for any mission behind enemy lines.