Countries want them, countries make the laws.
The Japanese were going to fight to the last man and the Americans did not want to have many thousands dead in an invasion of Japan so they dropped Nuclear bombs to quickly end the war with no more casualties for them (but thousands for the Japanese). Basically the Americans did not want to invade mainland Japan and used Nuclear bombs to avoid the loss of American soldiers.
the U.S. did not want the Soviet Union and China to enter the war.
fission bombs, fusion bombs, in the late 1950s "clean fusion" bombs. aerial bombs, artillery shells, missile warheads, you name it they did it. (the DOD did want nuclear hand grenades and mortar shells, but the labs didn't quite get them that small.)
They usually have a higher yield.Fission bombs are limited by the laws of physics to about 500kTon to 1MTon yield.Fusion bombs have no such limits, just keep adding stages with more fuel and you can get any yield you want, if you can carry it to the target.
If they really want to build them they will, everyone else that wanted them has them.
a a national park
the U.S. did not want the Soviet Union and China to enter the war. novanet :)
I don't know what radius you want, but whichever one it depends on yield.
Not to go to Nuclear War with the Soviet Union.
In North Korea and China during the Korean war. He got fired by Truman for that.
Well, I assume you mean the NUCLEAR bomb, which was used to bomb Japan as they did not want to surrender...