Ask and ye shall receive:
After all these years, please give me something more than eyewitness testimony, please...
The Radiation Story
The idea for gathering together a group of scientists, to whom we referred as our “panel of experts,” had been conceived early in 1952 - as soon as serious talk about the possibility that the UFO’s might be interplanetary
http://www.nicap.org/rufo/rufo-15.htm
Category 9
Radar Cases
http://www.nicap.org/cat9.htm
LOL They can’t Prove Bigfoot either...
That doesn’t mean that they don’t exist....
Agreed, but for what it's worth, while I was on jury duty a year or so ago, the judge let us know that the defendant's guilt could be determined beyond a reasonable doubt on eyewitness testimony alone.
However, if there are indeed aliens flying around, it doesn't necessarily follow that they would ever announce themselves, any more than we'd formally announce ourselves to animals at a wild animal park, which may well be how they regard earth. For all we know, an alien entity "owns" earth, and charges admission for tours of it. If a tram breaks down in an animal park, the owners don't just leave it there, they go pick it up. Anyhow, potential aliens may have some interest in us, but on the deeper level, they also may not just give much of a damn.