I became interested in the UFO question at a young age, primarily because my father is and he had all the 1950s books related to the subject. I have followed the question from the very beginning of modern UFO history. That doesn't make me an expert, just an interested observer. From Arnold and Adamski to the present each generation has had it's smoking gun that didn't smoke or government official about to reveal information which would finally provide the world with the real answer regarding flying saucers who ends up not really having any answer. So after absorbing 50 plus years worth of books, Internet info, movies, even a sighting of my own (a UFO in the truest sense as I don't know what I saw), I still don't see that we have an answer, unless the answer is UFOs as craft from another world do not exist.
So I'm wondering if I'm missing something and want to throw this question out-
Do we have concrete proof that UFOs as alien craft exist and said proof has somehow been mislaid, hidden, misinterpreted or lying right in front of us unnoticed? Or is there nothing solid on which to hang the alien UFO theories. Are we just counting angels on pin heads?