While flying with several other USAF pilots over Germany in 1957, we sighted numerous radiant flying discs above us. We couldn't tell how high they were. We couldn't get anywhere near their altitude.
I did have an occasion in 1951 to have two days of observation of many flights of them, they were of different sizes, flying in fighter formation, generally from east to west over Europe.
Information on UFOs, including sighting reports, has been and is still being officially withheld.
We'll miss you, Al, but we'll be there before long, so we can try some of that flying ourselves,