Bob Lazar said that the ultimate goal of the reverse engineering program was to duplicate the saucers given to the US military. How can humans duplicate the technology if earth doesn’t even have the fuel they use. We can kiss “warp drive” like in Star Trek or “light-speed” like in Star Wars goodbye since element 115 doesn’t exist on earth. Sorry to sound pessimistic but that’s how I see things going. Humans are going to be stuck on this rock called earth for eternity. We can forget about “travelling to the stars” for humanity.