The "Lenticular Reentry Vehicle"

Wild stuff:

The official designation for America’s nuclear flying saucer was the Lenticular Reentry Vehicle (LRV). It was designed by engineers at the Los Angeles Division of North American Aviation, under a contract with the U.S. Air Force. The project was managed out of Wright-Patterson Air Force Base, in Dayton, Ohio, where German engineers who had worked on rocket plane and flying disc technology had been resettled.

The LRV escaped public scrutiny because it was hidden away as one of the Pentagon’s so-called “black budget” items -- that is, a secret project that is incorporated into some piece of nonclassified work.