In the light of your question I think it was a Russian success and the US is yet to achieve such achievements. During that time when the Cold War is in the climax between the two superpowers both competed not only in arms race but technological advances trying to outwit each other. The Russians gain the upper hand because they were able to make the things stated above before the United States but in the end the US was able to make also such things in their own ways and successfully outwitting the USSR in economy and world power.
