https://en.wikipedia.org/wiki/1999_F-117A_shootdown
And how the Chinese reversed engineered it and the Americans bombed their embassy in revenge ...
https://en.wikipedia.org/wiki/1999_F-117A_shootdown
And how the Chinese reversed engineered it and the Americans bombed their embassy in revenge ...
Here is an article from AP written ten years later, essentially saying that the Chinese based their J-20 stealth fighter on the pieces of the F-117 laying on the ground in Serbia:
https://www.theguardian.com/world/2011/jan/23/china-stealth-...
Chinese stealth fighter jet may use US technology
China may have bought parts of US F-117 Nighthawk shot down over Serbia in 1999, say experts
https://archive.org/details/ufintsev-method-of-edge-waves-in...
Wiki link about 117 development that mentions the work by Pyotr Ufimtsev.
https://en.wikipedia.org/wiki/Lockheed_F-117_Nighthawk#Devel...
Oh and it's not like that was the only time poor recon resulted in bombs dropped in another place during the intervention. The execution of it is certainly not a high in NATO's history.