because US has no other source to kill enemy
Weapons during the arms race.
the US supported korea during the civil war
They didn't.
The US wanted these weapons to be used against Germany, before they could use them against the Allies. However Germany was defeated with conventional weapons before these weapons were ready. So the US decided to use them on Japan as soon as they were ready, to end the war without having to invade Japan.
Although US agreed several arms agreements banning use of nuclear weapons, USA DOES use nuclear weapons and in fact, US is the ONLY nation to have used nuclear weapons in war.
how the us provided the people and weapons to fight the war Uh! rubbish answer
The only country that has ever used nuclear weapons in any war was the US, at the end of WW2.
Which President? US or UK. Since US is the first country to use nuclear weapons, then I assume that you are asking who was the US president during world war two while nuclear testing? Answer: Truman.
Atomic and nuclear weapons.
Neither.
Probably during the cold war but not anymore.
Only on test sites.