Then USA is not superpower. Any country with the nukes or large determined population and difficult terrain can stop us.
I don't agree. They can make it more difficult for us to win, but they can not stop us. The large number of nukes with international delivery vehicles that the Soviet Union had could stop us, but not "any country with nukes." Even a big spanking like a nuke at Wall Street would not end the game. It would just change the way we play it.
When I lived in Texas we had to deal with imported fire ants in our yard. They were a pain, but they could not change the fact that I could go where I wanted when I wanted, and I could drive them out at will. I never truly "defeated" them, but they never even slowed me down.
The analogy isn't perfect, but it serves.
Shalom.