Bob Lazar's claims have stirred controversy and fascination since the late 1980s, when he first asserted that he worked on back-engineering alien spacecraft at Area 51's S-4 facility. According to Lazar, he was hired to analyze and replicate the propulsion systems of extraterrestrial vehicles, specifically those powered by Element 115, a substance purportedly not found on Earth at the time. He described encountering several flying saucers, one of which he allegedly studied extensively. Lazar's accounts include details of the craft's propulsion, operation, and the layout of the facility where he worked. Despite skepticism from many quarters, including his credentials and inconsistencies in his story, Lazar's claims have garnered a dedicated following and continue to be debated among ufologists and conspiracy theorists.