Bob Lazar
Robert Scott Lazar (January 26, 1959), or Bob Lazar, worked from 1988 until 1989 as a physicist at an area called S-4 (Sector Four), located near Groom Lake, Nevada, situated next to Area 51. According to Lazar, S-4 was a hidden military location for the study of extraterrestrial vehicles.
In November 1989, Lazar appeared in a special interview with investigative reporter George Knapp on Las Vegas TV station KLAS to talk about the several aspects and implications of his work at S-4.
Bob Lazar says he was initially introduced to work at S-4 by Dr. Edward Teller. His task was to study the propulsion system of a disc-shaped spacecraft, as part of an ongoing top secret space flight program.
In his filmed testimony, Lazar explains the specifics of the extraterrestrial craft’s propulsion system. As a power source, the spacecraft uses atomic element 115 which, under bombardment, would create an anti-gravity effect. The gravitational field around the spacecraft could thereby be bent, allowing the vehicle to shorten its distance to a desired destination.
Lazar was briefed about the origin of the craft. The so-called flying saucers are vehicles from the civilization of the Zeta Retuculi 1 & 2 star system, whose race is referred to as Zeta Reticulians, popularly called the ‘Greys’.
sources: Wikipedia.org