Close Advertising Evidence The Case For NASA UFO's Part 1 Documentary by David Sereda. Detailed analysis of very large UFOs that have been filmed by NASA. Some of the objects being … NASA aliens China UFO Crash david sereda Dogan Tribe Earth nasa Sirius (Star) Space STS 75 STS space missions STS-85 Tether Incident ufo 39808 views 0 / 0