[Hoot Gibson]

^I disagree. We are getting close to a point where AI will be used to operate autonomous probes in space. The distances would be too great to remotely pilot probes from Earth on exoplanets and any advanced civilization would probably be faced with that same dilemna - unless a way around the speed of light limit is reached. Sending live bodies multiple light-years to probe other planets will always be more expensive than sending AI-operated probes.

IMO, a civilization is only likely to send live beings to planets outside of their own star systems to colonize them. If aliens visit Earth, then we should begin preparing for an invasion.

I do agree that it is fun to speculate about UFOs and aliens because most of us will never know when and if aliens first arrive(d). 

At this time, I find that it is far more likely that reports of alien technology are attempts by human governments to distract attention away from their corruption and mistakes than the "evidence" is genuine.

I work near the National Geospatial-Intelligence Agency(NGIA). When I first began working here, I made a couple of wrong turns and ended up at a gate of the NGIA. The guards starting waving their arms and yelling, "You are in the wrong place!" before I rolled to a stop. They were probably expecting a black SUV with darkly tinted windows. 

UFO ‘whistleblower’ says government has ‘intact’ non-human craft
UFO ‘whistleblower’ says government has ‘intact’ non-human craft

UFO ‘whistleblower’ says government has ‘intact’ non-human
UFO ‘whistleblower’ says government has ‘intact’ non-human craft