September 30, 2021
For educational institutions
⟶ Updated 18 Oct 2018 ⟶
List of edits
Trinity Test to see if the Fat Man design will work
Flying practice missions over Japan started
President Harry S Truman gets successful reports about the Trinity Test
President Harry S Truman and Soviet Premier Stalin, receives current target list, in order of choice it is: Hiroshima, Kokura, and Niigata.
General Leslie Grove drafts the directive authorizing the use of the atomic bombs as soon as bomb availability. It lists the following targets in order of priority, Hiroshima, Kokura, Niigata, and Nagasaki.
Official courier for the Fat Man core, signs for 6.1 kg of plutonium
President Truman issues the Potsdam Declaration, which warns Japan of "prompt and utter destruction" and requires unconditional surrender of the Japans army.
The Japanese Government rejects the Potsdam surrender demand. The five C-54 transports arrive at Tinian. All components for Little Boy are now on.
The nuclear components (parts) are inserted into bomb unit number L11.
The assembly of the little boy is completed and is ready for use the day after.
A typhoon approaching Japan prevents them from dropping the bomb.
The assembly of the Fat Man begins the bombing date is set for August 11th.
LeMay officially confirms the mission for the next day.
They drop the bomb Little Boy on Hiroshima
A message to Vice Chief of the Imperial Army Torashiro Kawabe reports: “The whole city of Hiroshima was destroyed instantly by a single bomb.”
A seven-man Imperial Army investigation team arrives at Hiroshima and circles the city by plane.
The Bomb Fat Man hits Nagasaki
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