LARRY KING, CNN HOST: Tonight, are UFOs real or fake? Have they actually been here? Some say the truth is out there. Others say there is no proof at all. Now we'll go inside some 60 years worth of sensational, controversial reports about people who say they saw UFOs, and those who even claim they were abducted by them. Investigators on both sides of the UFO question will take your calls.HOPKINS: The most important point here, Larry, is that [in a] conversation I had years ago with the late Carl Sagan, we agreed that the UFO phenomenon was an extraordinary phenomenon. What I said to Dr. Sagan was: shouldn't we be saying an extraordinary phenomenon demands an extraordinary investigation? We're not getting an investigation here. We're getting, unfortunately, lots of arm chair theorists who sit away from the investigation process, who have actually never really gone out to examine the site, the physical marks, or to do any medical work. KING: I will confirm that, because I interviewed the late Dr. Sagan many times, and he was open to the possibility and to more investigation of it.