Credible Sport...
A fascinating story. I know/knew several people who worked on that project, including my Grandfather. He apparently worked on the restraint systems for the passengers. That project was on such a tight timeline, they didn't even have time to issue security clearances to the people involved who didn't already have them. "Can we bring Bob into the project?"... Sure, he doesn't have a clearance, but we need him and he's trustworthy.
Of course, that led to some security issues, like me (as a 14 year old) being asked about it by one of my friends at school. I was unaware, but my friend's dad was a shrink, and he had a client who was extremely strung out over the project.
One of the airframes used to be at the Air Force Museum in Warner Robbins. I knew exactly what it was when I first saw it, even though the sign beside the airplane didn't have a word about all of the unique modifications on the airframe. That airframe eventually was transferred to a museum in the NE.