So many things wrong with this thread.
We landed on the moon.
We did not bomb Japan to show we were better then Russia. We did it to end the war. We didn't care about beating Russia in WWII, they were on our side :p. That started later.
We stopped because it cost a lot of money, and the US got everything they needed out of the deal. Americans stopped caring about it.
The Russian space program was not superior. They made better rockets. This helps a lot when getting things into space. That's where anything they did better stopped. Getting a live man that far away... and then getting him back, is very very hard. They never had the technology to do it.
When will we go back? When we can make a space lift, so 50 years or so.







