In the United States.
The atomic bomb was developed in the middle of the 20th century, and has been made since then.
usa
Atomic bombs were dropped in WWII
Plutonium was and still is used for atomic bombs. The atomic bombs you are talking about would be fat man and little boy. They were the two used to bomb Hiroshima and Nagasaki Many people were killed when the b-29 bomber dropped fat man.
More & higher yield atomic bombs, I guess.
None, nobody had either the material or infrastructure to do so.
NM
USRussiaUKFranceChinaIndiaPakistanIsraelNorth Korea
In the United States.
The atomic bomb was developed in the middle of the 20th century, and has been made since then.
They are made up of atomic bombs,energy
The US made atomic bombs from 1945 to 1992.
2
7 :)
it made it greener with radiation...
As both atomic bombs and supernovas vary in yield, this question has no single answer.