-
Einstein Writes Letter to Roosevelt
Einstein found out that the Germans were developing plans to make an atomic bomb using Uranium-235. He wrote a letter to President Roosevelt informing him of the possible danger that could come from the Germans having an atomic bomb. -
Roosevelt Recieves Einstein's Letter
President Roosevelt recieves the letter that Einstein wrote to him about his concerns about the Germans reaserach on atomic bombs, and begins thinking about US research for their own atomic bombs. -
Manhattan Project Initiated
Roosevelt decides to inititate the Manhattan Porject, which was a secret project to research atomic bombs. The goal was to create the first atomic bomb to be prepared since the Germans already had some of this technology. -
Japenese Bomb Pearl Harbor
The Japenese bomb Pearl Harbor in Hawaii, which causes the United States to enter into World War II. This increases the country's need for reasearch and informatio about atomic bombs. -
Robert Oppenheimer Technical Director of Manhattan Project
Oppenheimer oversaw the research and design of the atomic bomb thrghout the entirety of the Manhattan Project. He worked along with the military director, General Leslie Groves. -
Oak Ridge, TN Selected for Location of Pilot Plant
Groves selects this location in Nennessee to build the first pilot plant for developing atomic bombs. -
First Controlled Nuclear Chain Reaction
A group of scientists created the first controlled nuclear chain reaction in the U.S. This took place at the University of Chicago under Stagg Field. These scientists were led by Enrico Fermi. -
Pledge to Continue Research
Roosevelt and Churchill meet and sign a pledge that says they will continue reasearch on atomic bombs and weaponry in the United States. -
First Atomic Bomb Detonated
The first atomic bomb was called "Gadget" and was detonated on July 16, 1945 in the desert in New Mexico. -
Japenese Surrender from War
The United States uses atomic bombs and warfare to end World War II by using atomic bombs against Japan.
