It looks like the Russians got their jet design from the British, and their atom bomb from America.
There has been a lot of that.
Lyndon Johnson authorized the sale of precision miniature ball bearing grinding machines to Russia, and the resulting improvement in their ICBM targeting cost us billions to harden our silos.
Jimmy Carter authorized the sale of precision machine tools for making submarine propellers. That cost us billions to regain the ability to track the quieter Russian Subs.
I am sure there are more examples.