The USSR's nuclear espionage helped their bomb project, but it was not essential. They more used it to check their own work, and likely stopped some detours on the road. And if their space technology was "borrowed" from the Germans, so was the US's.
Definitely! They've steal US nuclear documents just for laughs, comrade!
When Project Apollo uses Yu. Kondratyuk's (A. Shargey) staging calculations of course that's not a copying of a critical part.
"The aircraft was introduced into passenger service on 1 November 1977, almost two years after Concorde, because of budget restrictions."
Yes, they've managed to "overcame bourgeous West" with Tu-144, but because design and production was rushed - they got Paris air show crash, postponed operational services and generally bad design, forcing earlier retirement for Tu-144.