Most of the stories about Aliens originate from US. I've listened that one of US presidents have funded the controversy hugely.

I also believe in the existence of Aliens but I don't believe that any of them have ever touched our hemisphere. Take it on us, we should be aliens to other earth like planet. Who would you send there if you ever got opportunity. I think we shall send a machine because human life is not that long which can sustain so many years of travel. A small robot inside a small UFO should do it.