There is no doubt about it whatsoever. The massive destruction was the result of a single nuclear air burst, from a weapon dropped from a single B29 bomber.
Both US and Japanese military records confirm that a single bomb was dropped from a very small flight group (three B-29 bombers in total: Enola Gay, which dropped the bomb; The Great Artiste, which carried instrumentation to observe the effects of the bomb, and a then-unnamed Photography plane).
See: Atomic bombings of Hiroshima and Nagasaki
hiroshima
Hiroshima, Japan
An Atomic Bomb I think.
It was both: an atomic bomb using uranium as its fuel.
Hiroshima & Nagasaki.
1945
The atomic bomb was dropped on Hiroshima and Nagasaki in World War 2.
One day after the atomic bomb hit Hiroshima in Japan.
The city of Hiroshima was the place where the first atomic bomb was dropped.
Uranium-235 was used in the atomic bomb dropped on Hiroshima.
The atomic bomb was dropped on Hiroshima and Nagasaki RB