Close Advertising Rare Documentary by BOB LAZAR on Alien technology | UFO (part 3) Bob Lazar explains the physics of gravity, graviton, UFO technology, alien craft technology. He goes into detail, explaining the … Bob Lazar #uap aliens anti gravity engine area 51 bob Bob lazar element 115 engine flying saucer george george knapp Greys KNAPP lazar military base s4 Saucer secret base secret military base secrets US 56521 views 0 / 0