Bob Lazar.

Bob Lazar is an American Scientist figure who claims to have worked on reverse-engineering extraterrestrial technology at a site called S-4 near Area 51 in the late 1980s. He gained public attention in 1989 when he appeared in a series of interviews with investigative journalist George Knapp on Las Vegas television station KLAS. In these interviews, Lazar made extraordinary claims about his alleged involvement in back-engineering alien spacecraft and described the existence of nine flying saucers at S-4.

According to Lazar, he was employed as a physicist and engineer at S-4, where he purportedly worked on advanced propulsion systems of alien origin. He claimed to have encountered and examined advanced technologies, including anti-gravity propulsion systems and gravity amplifiers. Lazar's accounts included descriptions of alleged extraterrestrial materials and an element called "Element 115" (later named Moscovium), which he claimed was used to power the alien spacecraft.

Lazar's claims and his alleged experiences at S-4 have been met with both support and skepticism. Critics have pointed out inconsistencies and discrepancies in his story, and some have questioned his educational and professional background. The scientific community has generally dismissed his claims due to a lack of credible evidence supporting his assertions.

Despite the controversy surrounding Lazar's claims, he has maintained his story over the years and has continued to be a prominent figure in UFO and conspiracy circles. His interviews and revelations have contributed to the popularization of the Area 51 conspiracy theories and have sparked ongoing debates about the existence of extraterrestrial technology and government cover-ups.