Here is one of your UFO's:
Thank you Kelly Johnson and the Skunk Works. It should come as no surprise that UFO sightings proliferated as the US started developing technology like the SR-71 with capabilities that even those in the industry would deem impossible. The US government even encouraged it.
Quick bit of trivia, the SR-71 leaked fuel while on the ground. It wasn't until the fuselage heated at high speeds and expanded as much as a foot during flight that the leaks would seal. It became more efficient the faster it flew, figure that one out.
Amazing considering development started in the late 50's.
“Results! Why, man, I have gotten a lot of results! I have found several thousand things that won’t work.”
Attributed - Thomas Edison