The Russians knew nothing about the Manhattan project and if they did they would have tried to develop a nuclear weapon before the US did.
At this time Russia.
If Russia, Afghanistan or any country tries to attack us we can use a nuclear weapon and send them back home. The countries with nuclear weapons won't attack us with those weapons because they know that if they attack with them, we will attack them back ans nobody wants to be attacked.
USSR
Nobody, the US was the first country to work out how to actually make nuclear weapons.
Probabaly Iran launching a nuclear warhead at us because of the "you-should-be-more-like-us" harassment, the missile supplied by their friend, Russia, leading to nuclear war followed by nuclear winter, and the human race dies out.(hope the nuke is their most powerful non-nuclear weapon in their arsenal instead.)
Yes it can. The distance from Russia to the U.S is 9000km, r-36 Russian missile could travel 16000km in 30mins(and it is a 1967 one).
America has roughly 10000 nuclear warheads and russia has anywhere from 5200-8800
The US performed the first nuclear weapon test on July 16, 1945.
End of WW2.
never, most of their nuclear weapon activity was for propaganda purposes.
Not if they love their children.