There is a few really great stories about the SR-71 on the internet, many out of the book "Sled Driver". I would not (as it is customary on other parts of the internet) leave the full copy-pasta here, but I do recommend the "air speed check) story (to be found e.g. at https://oppositelock.kinja.com/favorite-sr-71-story-10791270... ) and the low fly-by (e.g. at https://foxtrotalpha.jalopnik.com/the-sr-71-blackbirds-most-...).