In theory, maybe possible. But honest-to-god critical thinking/sincere question: given that multiple countries have had satellites, deep space observation methods, giant telescopes etc how is that alien ingress have never been noticed? Aliens couldn't have known that US/UK were the preferred destinations - countries with large surface areas like Australia, Russia, Brazil and India don't report such activities in gene…
The US and the USSR had to collaborate on filtering out UAPs from radar early warning systems so we didn't nuke each other.
Two of the people testifying in front of Congress are ex military pilots noting that they saw, and logged on radar, objects.
The third has stated specifically that we do have satellite data and imagery displaying UAPs.
> Why is that UFOs are coming up as pop culture topic just now in last few decade
UFO reports from the middle ages exist, both in paintings and in writings. Ship captains have reports in their logs from the 16 and 1700s. Reports from within the U.S. in the 1800s exist.
I haven't provided references here in the interest of my time, but all of what I stated here is readily verifiable with a few internet searches.
All arguments of the form "where is the evidence" are moot at this point, as there is a mountain of evidence. The issue today is provenance. With claims so large, even HD video of an object and creatures in real time wouldn't be enough. The only thing that would convince people is the word of the US (or some other major country) government itself providing evidence, which it has done in small doses, and is the only reason this hearing is happening.