I watched a 2 hour report on the CIA, Airforce and the US Government, and a handful of universities. It documented the accounts between like 1940 to present regarding the possibility of alien visitors and how the government covered it or the CIA did.
More beleiveable is the fact they did secret testing on Spy planes, which explain unidentified aircraft by normal citizens, and the secrecy at area 51, and how the government always tried to debunk Alien beleivers, however always allowed them to go on somehow, leaving just enough trail to keep them sniffing just enough to keep them off the right track: building a spy plane to fly over russian territory undetected.
However it goes even further to document many pilot accounts of strange flying objects. Again debunked, saying the new spy planes used a very polished aluminum (not sure if it was that, or some other shiny metal), and up 60,000 miles with the suns rays beaming off the aluminum would make any fighter pilot possibly see a white ball (the luminescense from the sun off the metal would give it a round shape or even some unnatrual form for flight) which also explains their sightings.
Then there are photo's over 700 are considered untampered and unsolveable by the CIA and universities in the US. 700 pictures, not tampered with, documenting either a ship in flight, or an actual being.
Their is a ton of stuff out there all around the world, pointing to the fact aliens already do exist, and we have encountere them. There is even a report during a WW, the US west coast was beleived to be under attack by the japanese, the report stated the entire city's lights were shut down, and the anti aircraft batteries were turned on, and they fired over 4200 rounds at an object in flight. however the object didnt budge, finally it just up and flew away.
The city had collateral damage, the US army's official statement said the damage done was due to friendly fire.
I think either the world has saturated itself so much into these stories, making it impossible for me to decide if we met them or not, and at the same time i know there is other beings in this grande universe. It is selfish to think we are the only intelligent beings in this entire universe we havent even really begun to explore.
I want to beleive.