In my opinion the evidence shows that UFOs are real, of alien origin, and interacting with humans. I am turning 30 on March 7th and I have been looking deeply into both sides of this issue since I was in the 2nd grade. Here is some material that I strongly suggest taking a look at.
http://www.debunkingskeptics.com/UFOs: Generals, Pilots and Government Officials Go on the Record by Leslie Kean
http://www.amazon.com/UFOs-Generals-Pilots-Government-Officials/dp/0307716848 Here is a great piece she wrote for MSNBC.
Skeptic misses point behind UFO book - Solid sightings cited in ‘UFOs’; serious investigation needed
http://www.msnbc.msn.com/id/38977500/ns/technology_and_science-space/The Disclosure Project is a nonprofit research project working to fully disclose the facts about UFOs, extraterrestrial intelligence, and classified advanced energy and propulsion systems. We have over 400 government, military, and intelligence community witnesses testifying to their direct, personal, first hand experience with UFOs, ETs, ET technology, and the cover-up that keeps this information secret.
http://disclosureproject.org/Here are two great films by James Fox.
UFO Coverup Documentary - Out Of The Blue Part 1/9
http://www.youtube.com/watch?v=mdZpRcTBwdA I know what i saw 1/9
http://www.youtube.com/watch?v=2nItzZrEkCI After 50 years of study and investigation, nuclear physicist Stanton T. Friedman has summarized his views about flying saucers. He is convinced that the evidence is overwhelming that some UFOs are intelligently controlled extraterrestrial spacecraft, that the subject represents a Cosmic Watergate, that there are no good objections to these conclusions, and that flying saucer reality and its cover-up is the biggest story of the past millennium.
Stanton T. Friedman Presents Flying Saucers and Science
http://www.youtube.com/watch?v=sn8OIkYwAro http://stantonfriedman.com/Abduction: Human Encounters with Aliens by John E. Mack
http://www.amazon.com/Abduction-Encounters-Aliens-John-Mack/dp/0345393007 From Booklist:
Mack's credentials are impressive; he's a Pulitzer Prize winner and professor of psychiatry at the Harvard Medical School's Cambridge Hospital. He has investigated 76 UFO abduction cases over the past four years and here summarizes 13 of them, also offering his scholarly comments and controversial conclusions. These narratives involve scenarios that are sexually explicit, terrifyingly gruesome, and mind-numbingly chilling in their implications for the nature of reality. The individuals Mack portrays have experienced deeply traumatic events that have transformed their lives--for the worse at first, but ultimately for the better. According to Mack, the aliens are objectively real and seem to be abducting people for two purposes: (1) changing human consciousness to prevent the destruction of Earth's ecosystems and (2) creating offsping from aliens and humans. What sets Mack's book apart is his willingness to deal with some of his clients' assertions that they themselves are half-human and half-alien, at least psychologically or spiritually; his acceptance that the laws of physics can be broken (many abductees claim that the aliens can "float" them through solid objects such as doors and closed windows); his seemingly routine procedure to hypnotically regress abductees into previous incarnations; and his emphasis on spiritual transformation as the nexus of the abduction (even likening it to a shamanic expansion of consciousness). How much you agree with all this may depend on where you're coming from to begin with. Nonetheless, Mack has shown the psychiatric community that the UFO abduction syndrome is a real problem that deserves serious clinical attention.