He said that JFK’s interest in UFOs could have been fuelled by concerns about relations with the former Soviet Union. ‘One of his concerns was that a lot of these UFOs were being seen over the Soviet Union and he was very concerned that the Soviets might misinterpret these UFOs as U.S. aggression, believing that it was some of our technology,’ Mr Lester told AOL News. ‘I think this is one of the reasons why he wanted to get his hands on this information and get it away from the jurisdiction of NASA so he could say to the Soviets, “Look, that's not us, we're not doing it, we're not being provocative. “.’ But conspiracy theorists said the documents add interest to a disputed file, nicknamed the ‘burned memo’, which a UFO investigator claims he received in the 1990s. The document, which has scorch marks, is claimed to have been posted to UFO hunter Timothy Cooper in 1999 by an unknown CIA leak, but has never been verified.