No, I don't believ in aliens.
When there is evidence that they exist or even could exist, and that they could actually get here, then I'll believe they exist or are here.
Currenly there aren't any places we know of where they could live, and actually get here within a reasonable time that we could comprehend.
At this point, there is no compelling data that suggests they could exist or could get here.
If they did exist, they'd have to get here. And we'd have to be able to detect them. If they looked like dirt, or clouds, we probably wouldn't notice them.
There were a great many sitings of 'space ships' during the Cold War - the military recently admitted that they were spy planes, first tested in the US, and then flown over Russia, to try to find new missile sites and bomber plane building factories, among other things. THe military believed we had a 'missile gap' (and before that, a 'bomber gap')and they wanted big bucks from the federal government to make tons of very costly weapons and airplanes. Our US presidents - especially Eisenhower, were skeptical, so before satellites, we developed airplanes. That could fly at 80,000 feet. For many hours. Very long distances.
And they of course had to be intensely tested in the US. They were horrific to land, but boy could they fly. And when they began to run low on fuel, they could get up to 80,000 feet. And boy could they coast. There are stories of them coasting from Kentucky to New MExico.
There were times when the Cold War operations were very strange. For example, they had to measure missile sites from the photographs the spy planes took, so they'd fr example, roll into a small town, find a diner, and then put things of a known measurement down on the ground - like very long striped tarps - and then sit in the cafe and drink coffee, looking at their watches the whole time, and then at an appointed time, get up, go outside, fold up the tarps and leave.
During that time, our spy plane would fly by, at fifty thousand feet, and take pictures of the tarp - with a camera that could see objects down to two to three feet in width - from fifty thousand feet.
Of course, it was all had to be top secret, because there were Russians in the US trying to find out about the planes.
But it wound up with a great many people 'seeing space ships'.
