Mysterious Balloons Linked to UFOs
The CIA declassified files showed images of these types of balloons, which were often used to spread propaganda during the Cold War. In the 1950s, the agency released about 500,000 of these balloons carrying about 300,000,000 leaflets, books and posters throughout Eastern Europe. But for some reason, the photos of these balloons ended up in the CIA’s UFO files.