Originally posted by gariac
I can't vouch for the accuracy of what is on this webpage.
Now we do know that planes have been buried at Groom, but perhaps not as told here. Regarding a classified museum, well having T/S classification doesn't mean you get to see everything. There is still that nagging issue of "need to know."

Strong evidence also suggests that a number of as yet unacknowledged aircraft lie buried near the dry lake at Area 51. One former Groom Lake employee, speaking in 2001 on condition of anonymity, said he witnessed an earth-mover spend a day excavating a burial site in 1982. He said the wreck of a top secret aircraft had been stored for months in the ‘Scoot-N-Hide’ shed, a hangar near the taxiway designed to swiftly hide planes from orbiting satellites. According to the witness: “They put it on a flatbed truck and put it in a hangar. Then one day they scraped it off the flatbed into the hole and buried it,” he said. “They attached a cable to the aircraft and just pulled it off. The thing was shattered like an egg.”

Former workers and widows of workers claim injuries resulting from illegal hazardous waste practices at Area 51 in the 1970s and 80s. Highly toxic resins were allegedly dumped into open pits and burned, and workers at the base were exposed to the fumes. The most prominant plaintiff is Helen Frost, window of Robert Frost, who died in 1988. An autopsy of Frost's body revealed high levels of dioxins and other carcinogens which the widow contends were caused by exposure to fumes at the base. In 1996, the lawsuit was dismissed by a Federal judge on the grounds of military's national security priviledge. That decision has since been appealed to the Circuit Court of Appeals in San Francisco, and the appeal is pending.