You will have define what you mean by successful. They work. The use of two atomic weapons in WW II ended the war. They have not been used since. I guess you could call THAT a success.
US
With the successful development of the atomic bomb.
A nuclear bomb is any bomb with any nuclear or atomic material inside it, while a plutonium bomb is a specific type of nuclear bomb. Plutonium could be the nuclear material inside the bomb, and if it is, it's a plutonium bomb.
The best nuclear bomb is the Tsar bomba
Germany has not made a nuclear bomb.
Robert Oppenheimer is the father of nuclear bomb.
A nuclear bomb or atomic bomb
Atomic bombs are a type of Nuclear bomb and there are 2 types of nuclear bombs. The second type of nuclear bomb is a hydrogen bomb.
nuclear bomb
No president invented any nuclear bomb.
Plutonium+Weapons=Nuclear Bomb
That depends on how big the nuclear bomb is.