The Atomic Bomb
At the near end of World War 2, the Americans had finnaly succesfully tested their first atomic bomb.
It is a bomb that activates through nuclear fusion at a temperature higher then the core of the sun. After impact , in a very short amount of time, it goes nuclear.
Its name, The Atomic bomb, or A-Bomb for short comes from the reason it explodes, the splitting of an atom. The Americans used this bomb 2 times at the end of World War 2. Both times in Japan, once in Hiroshima and once in Nagasaky. This bomb made the japanese finnaly surrender and for World War 2 to finnaly be over.