Thats interesting. I’ve heard that civilian pilots during the Cold War would hear similar things or exchanges between unknown aircraft that later turned out to be top secret aircraft like the U-2 or SR-71. This is slightly off subject, but just to share something interesting: I read a guy whose dad was a Royal Canadian Air Force spy plane flight instructor during the '60s. He said his dad would often cross over the border into Montana to a top secret underground NORAD joint US/CAN base (just a short drive from their hometown) to assist the USAF and the RCAF in instructing their pilots to fly spy aircraft. One day he said to his kids: “This might get me killed, but come outside and look up at 1 o’clock. You might see something.”
His kids and wife, obviously interested, looked up into the sky at one and saw a faint black dot moving extremely fast across the cloudless blue sky. His older brother said importantly: “That must be the YF-12!” (The YF-12 was a fake name that the CIA gave to the public in case they saw the SR-71)
Later on when the SR-71 was declassified, their father told them that the to tell the pilots he was training that in case they were out on a mission and had an emergency; to destroy the aircraft and make it look good. The Canadian pilots were told if they tried to make an emergency landing at anywhere but the secret base in the Badlands, they, and I exactly quote here, “would not be returning to their country at the end of the month.” end quote.
Crazy stuff. I guarantee there are aircraft right now being developed that they are hiding from us, probably even the SR-72!