UFO's

As all of you know, UFO's are my favorite of all the paranormal topics. I came across this just a few minutes ago while killing time before going to bed. What if it's true? The man being interviewed mentions a book by the late Corso which I believe, made up most of his story (good read but sorta falls apart the deeper you go). So maybe all that he says could be based on his own opinion and not actual fact. But does it make sense that we would prepare for a war against beings that are not from here? Why do "they" most often show up during times of war? Interesting thoughts...