US Air Force Posts UFO Reports Online

130,000 pages of documents reveal extensive government alien investigations.
1:24 | 01/20/15

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Transcript for US Air Force Posts UFO Reports Online
Next tonight, for the first time, 130,000 pages of ufo records posted online, those sightings in the sky. ABC's nick watt on the skeptics who say the truth is still not out there. Reporter: Was this a ufo at the 1965 world's fair? Just one of the cases buried deep in 130,000 pages of documents that John green Wald just posted online for the very first time. There's absolutely something out there. The big question mark is, have they come here. Reporter: After the infamous alleged alien landing in Roswell in 1947, the U.S. Air force spent years investigating 12,618 Utz fo sightings. The military and the government wants you to believe that there's nothing to this topic. Reporter: Most sightings were debunked. That photo at the world's fair, quote, a processing defect. But 701 including numerous sightings over Washington, D.C. In 1952 remain not fully explained in the papers. Independence day, based on just a little bit of fact? They really couldn't at the end of the day explain some of these more important cases. Reporter: But in 1969, the government announced case closed. I believe the come mention proves beyond any shadow of a doubt that there is a coverup going on. Reporter: That's his conclusion. Now, you, too, can read the documents. And reach your own. Nick watt, ABC news, logs Angeles.

This transcript has been automatically generated and may not be 100% accurate.

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