I have no citations. My evidence is the millions of sightings, reports, photos, and videos, the overwhelming majority of which can be debunked as hallucinations, planes, weather balloons, planets, meteors, hoaxes, swamp gas, etc, etc. But to believe that all of them, without exception, are wrong, to believe that not a single report of all the thousands upon thousands is accurate, in my mind requires a greater leap of faith than is required to believe that at least one is legitimate.
Comercial break. The story of Roswell up next.
So, you have no evidence. Thanks for playing.
So did this scientist just say that when they see them they will have evidence? Really, I am not particularly passionate on this subject, but it's always the scientists who seem suspect to me. Too many are about protecting their own work and beliefs.