Has the Sr 71 blackbird ever been shot down?

No, not at all. The SR-71 Blackbird has never been shot down during their mission. There over 4,000 SAM's launched at the SR-71 Blackbird but still not even one hit. In reallife no SR-71 Blackbird was ever destroyed. Planning on destroying the SR-71 Blackbird is not really easy. The SR-71 Blackbird can avoid getting shot down really easily. It's not easy to get a lock on to an aircraft because they can deploying move into stealth mode. They can also deploy anti-missile flares. Missiles will not be able to destroy the SR-71 Blackbird.