It was Bush's fault that he did not open the investigation again. No joke.
A number of years ago, a nuclear loaded B-52 was shot down in New Mexico, it crashed on Mount Taylor west of Albuquerque, if I recall. The crash site was so hot with radioactivity that investigators couldnt even get close for a long while. It was years before the truth of the matter was released.
It seems that some fighter jets were playing with the B-52 doing mock missle runs on it, when a missle actually left the rail and popped the bomber. The information that was eventually released was that the pilot did not fire. Upon teardown of the planes, they found some moisture in some electrical part that allowed the radar pickup and all the automatic wizardry on the fighter to jump across the safeties and launch the missle.
I always wondered if something like this happened with 800? We may never know.