Project Blue Book: US Air Force UFO Documents Revealed

Here are the top five things to know from the open files the U.S. Air Force Project Blue Book.

Amateur historian John Greenewald has spent nearly two decades requesting declassified information from the US government regarding UFOs.

Recently, he posted more than 100,000 pages of documents on the US Air Force's internal UFO investigations to the internet. Here are the top five things to know from the open files of Project Blue Book. Read more

Air Force UFO Rules Vanish after HuffPost Inquiry

Was it just a coincidence that the Air Force deleted a UFO section from a personnel manual just days after a Huffington Post inquiry about it.

The military deleted a passage about unidentified flying objects from a 2008 Air Force personnel manual just days after The Huffington Post asked Pentagon officials about the purpose of the UFO section.

Before the recent revisions, the document -- Air Force Instruction 10-206 -- advised pilots, radar operators and other Air Force personnel on what to do when they encountered any unknown airborne objects. Now in the 2011 version, the reference to UFOs -- which simply means "unidentified flying objects," not necessarily spaceships with little green men -- has been eliminated.

What makes this so intriguing is that the U.S. government officially stopped investigating UFOs in 1969 with the termination of the Air Force's Project Blue Book. Read more