‘The tale said that President Johnson was supposed to name the Blackbird the “RS-71” and that he confused the letters, reversed them, and said “SR-71”’<p>Turns out in this case the stenographer was muddled<p><a href="https://theaviationgeekclub.com/sr-71-or-rs-71-how-the-legendary-blackbird-got-her-designation/" rel="nofollow noreferrer">https://theaviationgeekclub.com/sr-71-or-rs-71-how-the-legen...</a>