atomic bombing
The second was detonated three days after.
The Atomic bomb had to drop first, because after the bombing on Hiroshima and Nagasaki, Japan surrendered.
1945
Hirohito
WWII
The atomic bombing of Japan was done to end WW2 as fast as possible with as little loss of life as possible.
Hiroshima and Nagasaki were two in Japan.
Emperor Hirohito.
3 days
In the related links box below, I posted the information.
Most people argree with it.