There are more than 4000 landing trace cases from around the world.

It's been by turns frustrating and fascinating and wonderful beyond imagination. If what I suspect is true, it's one of the most important milestones in human history to acknowledge that we are not alone in the universe.

The evidence that at least one extraterrestrial civilization has visited Earth is extensive both in scope and detail. In its totality it comprises a body of evidence which at the very least supports the general assessment that extraterrestrial life has been detected, and that a vigorous program of research and serious diplomatic initiatives is warranted.

Back in the early 1960s, when I was eight or nine. Some neighborhood boys and I saw a disc-shaped, windowless object that hovered, silent, then simply vanished. My parents said, "That's very nice" and ignored it, but I knew what I'd seen, and it was life-changing.

There are hundreds of electromagnetic cases where spacecraft have been observed by police, military personnel and civilians to affect car engines, radios and other electric devices.

Various polls have indicated that approximately 10% of Americans (25 million people) have seen them at close range so that details of the structure of the object can be discerned.

CSETI (The Center for the Study of Extraterrestrial Intelligence) has in the past 18 months succeeded in intentionally establishing contact with extraterrestrial spacecraft, on two occasions at very close range, and with multiple witnesses present.