Secretary of War Stimson and
General Groves brief
President Truman on
Szilard visits White House with letter of introduction
Einstein to warn President
Truman of the dangers that atomic weapons pose for
the post-War world and to urge him not to authorize use of atomic
weapons against Japan.
US scientists perform first successful A-Bomb test
at Alamogordo, New Mexico.
Truman meets Stalin and Churchill
at Potsdam and tells Stalin about the A-bomb.Truman approves
General Grovesí recommendation to use the A-bomb on Japan.
US drops “Little Boy” nuclear
bomb on Hiroshima, immediately killing 140,000 citizens. Use
of the A-Bomb in WWII -
by the President Announcing the Use of the A-Bomb at Hiroshima.
US drops “Fat Man” nuclear bomb on Nagasaki, immediately killing 70,000 citizens.
Fat Man Mushroom Cloud
Hiroshima and Nagasaki, PBS video
Truman adopts the Truman-Attlee-King declaration (New Quebec
President's News Conference
following the signing of a Joint Declaration on Atomic Energy.
Soviets notify the US that they are developing the A-bomb.
Truman declares that all US land with fissionable material is
subject to government use and ownership. (These rights are later
given to the AEC in December.)
US performs A-bomb test at Bikini Atoll.
by the President
Concerning Preparations for Nuclear Tests in the Pacific.
Truman signs Atomic
(Public Law 79-585/McMahon Act), creating an Atomic Energy Commission
(AEC) to replace the Manhattan Engineering Distict (MED).
Letter to Senator McMahon regarding energy bill.
Reflection on Atomic Energy bill two years later.
Truman gives Atomic Energy Commission (AEC) jurisdiction over US fissile materials and sites.
Executive Order 9816
Truman plans for new A-bombs. Trumanís
US performs A-bomb tests at Eniwetok.
letter to Secretary Forrestal
on the Atomic Weapons Tests at Eniwetok.
The Soviets perform their first successful A-bomb test, referring
to it as ďFirst LighteningĒ while the US called it Joe 1 after
Statement to the American public.
Truman announces US plans to develop the H-bomb.
Representative Henry Jackson on the H-Bomb Decision.
USSR explodes another A-bomb.
Directed by Truman Addressing Recent USSR A-Bomb Explosion.
Truman establishes airspace reservation over the Las Vegas Project
in Las Vegas, Nevada. This site would eventually witness around
1000 nuclear tests. (Natural Resources Defense Council, Nuclear
Weapons Databook Project).
Truman establishes airspace reservation over the Savannah River Plant of the US AEC.