And of course Russians perfected rocket technology way in XIX century, using solid rockets as a weapon.
What are you trying to prove? That inventions aren't done in vacuum and everybody stands on the shoulders of giants coming before him? Or you literally believe that USA had a half century Cold War with opponent who can't invent a thing?
What are you trying to prove? That inventions aren't done in vacuum and everybody stands on the shoulders of giants coming before him? Or you literally believe that USA had a half century Cold War with opponent who can't invent a thing?