The Manhattan Project and the Atomic Bomb

By emilyeng9

  • Einstein's Letter to the President

    Einstein's Letter to the President
    Albert Einstein and Enrico Fermi thought that President Roosevelt should be informed of the dangers in atomic technology. Einstein wrote a letter to President Roosevelt that urged the development of atomic research.
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  • US Begins to Investigate Atomic Weapons

    The Americans began to design and build an atomic bomb and called the project, the Manhattan Project.
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  • The Manhattan Project Begins

    Although the Manhattan Project was founded in August, the Project really began on September 17th, 1942.
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  • Groves Asks Dr. Oppenheimer to Lead Project Y

    Groves Asks Dr. Oppenheimer to Lead Project Y
    In 1942, Colonel Groves asked Dr. J Robert Oppenheimer to head Project , which was the new planned laboratory for weapon physics and design.
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  • First Controlled Nuclear Chain Reaction

    A breakthrough occurred when Enrico Fermi led a group of physicists to produce the first controlled nuclear chain reaction at the University of Chicago.
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  • Bomb Test in the Jornada del Muerto Valley

    Oppenheimer approved the plans for a bomb test in the Jornada del Muerto Valley at the Alamagordo Bombing Range.
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  • Optimal Performance

    Oppenheimer reported optimal performance with implosion compression in sub-scale tests.
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  • President Truman Finds Out

    President Truman learned about the existence of atomic bomb development for the first time.
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  • The 100 Ton Test

    The 100 Ton Test
    The 100 ton test began and 108 tons of Composition B were exploded 800 yds. from Trinity. It was the largest instrumented explosion to this day.
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  • Gadget Begins

    Gadget Begins
    Assembly for the atomic bomb, Gadget, began.
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  • The Detonation of the Atomic Bomb

    Scientists of the Manhattan Project watched the detonation of the world's first atomic bomb. It created a blinding flash that was visible for 200 miles and the mushroom cloud reached 40,000 ft. and blew out windows in homes 100 miles away.
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