Research news
Bitesized UFOs #093: Aircrew & Airport Sightings on the Same Date, February 1959
Two incidents involving aircrew and airport officials took place on the same day in February 1959. The details of these sightings were relayed to a Pan American Airways captain who had his own encounter in 1952, in an aircrew ready room at an airport in April 1959. Pilots appeared to be discussing the UFO subject in private, even if they weren't always happy to talk about what they'd seen in public.
See more (external link) 
https://www.youtube.com/watch?v=fE5Lb9rwLmk