http://www.ibtimes.com/articles/134719/20110415/fbi-vault-alien-landing-1947-mexico-ufo.htm
Their mission is peaceful. They contemplate settling on this planet. They do NOT come from any "planet" as we use the word, but from an etheric planet which interpenetrates with our own and is not perceptible to us. The bodies of the visitors, and the craft also, automatically "materializes" on entering the vibratory rate of our dense matter. The disks possess a type of radiant energy, or a ray, which will easily disintegrate an attacking ship. They reenter the etheric at will, and so simply disappear from our vision, without a trace.