Believe or not, beings from other worlds have been on the earth for quite some time. The reasons for being here are as varied as the individuals themselves.
The radio program in 1938, War Of The Worlds narrated by Orson Welles, was considered a complete hoax and an untrue story.
However, I am here to tell you that some of the story is true. Some extraterrestrial aliens did come to earth during that time and live among you, even now. Many, from that period, stayed on the American east coast - but, there are a few scattered around the world - including the western United States.
Most non-humans are able to recognize other non-humans. Aliens usually "blend in" with the regular population by taking human "form" - thus, are very difficult to recognize. When they "shed" this human "form", all of their abilities and "powers" return. I know - because I am not a human.