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Heavy Hydrogen
In 1931, heavy hydrogen or deuterium is discovered by Harold C. Urey. -
Atom Split
The atom is split by John Crockcroft and E.T.S. Walton of Great Britain thereby proving Einstein's Theory of Relativity. -
Leo Szilard
Hungarian physicist Leo Szilard realizes the possibility of the nuclear chain reaction. -
Enrico Fermi
In 1934, the first nuclear fission is achieved by Enrico Fermi of Italy. -
Niels Bohr
At a conference at George Washington University, Niels Bohr announces the discovery of fission. -
Albert Einstein Letter
In August 1939, Albert Einstein writes to President Franklin Roosevelt concerning the use of uranium as a new source of energy leading to the formation of the Committee on Uranium. -
World War II Begins.
World War II Begins -
Lise Meitner
In 1939, the Theory of Nuclear Fission is announced by Lise Meitner and Otto Frisch. -
Plutonium
On the 23rd of February, 1941, Plutonium was discovered by Glenn Seaborg. -
President Approval
In October 9th, 1941, Franklin D. Roosevelt gave the go-ahead for the development of an atomic weapon. -
Fed Gov
In 1943 the federal government said they would name a bomber for New Mexico if they raised 30,000 dollars in war bonds. -
Franklin Roosevelt's Death
Franklin Roosevelt dies on April 12, 1945 making Harry Truman the 33rd president of the United States. -
War Ends in Europe
In May, 1945, the War Ends. -
Trinity Test First Atomic Bomb
The world's first atomic detonation takes place in the 'Trinity Test' at Alamogordo, New Mexico in July 16th, 1945. -
President Truman
President Truman orders atomic bombs to be used. -
Potsdam Rejected
Potsdam Declaration is rejected by Japan 2 days later. -
Fat Man Dropped
Fat Man was dropped in August 9, 1945 on Nagasaki. -
Little Boy
Little Boy was the bomb that was dropped on Hiroshima on August 6th. -
Japan Surrenders
Japan announces its formal surrender on the second of September, 1945. -
Potsdam Declaration
Potsdam Declaration is issued on the 17th of October, 1945, calling for the 'unconditional surrender of Japan'.