the first atomic Bomb created by the United States. The United

States supervised the development of the atomic bomb, under

the code name Manhattan Project, during World War II. The

first sustained nuclear chain reaction was achieved in

December 1942 at the University of Chicago under the direction

of Arthur Holly Compton. Key members of the research team

were Enrico Fermi and J. Robert Oppenheimer. Shortly after

the first bomb test was completed, atomic bombs were dropped

on the Japanese cities of Hiroshima (Aug. 6, 1945) and Nagasaki

The atomic bomb, which was developed secretly in the

United States during World War II, differed from all earlier

types of bombs. It contained radioactive substances that

underwent very rapid changes under certain conditions,

releasing immense quantities of light and heat.

For an atom bomb to explode, its radioactive ingredients,

an isotope of uranium called U-235 must be present in a large

quantity. The name of this quantity is called a critical mass.

The exact details of the bomb's construction remain secret, but

it probably contains two different quantities of radioactive

cases where people have claimed that they have witnessed this

The government even tried the experiment with people on board

about 5 minutes of being totally invisible the ship reappeared

atoms. The other main type of nuclear bomb is the hydrogen

completed this project he could have totally wiped out London

Another Goverenment Experiment called the

Some common words found in the essay are:
War II, Philadelphia Experiment, Master Race, Einstein People, Government Hitler, Honshu Island, Army/Air Force, Oppenheimer Shortly, Manhattan Project, atomic bomb, Nagasaki Aug, people witnessed, atom bomb, manhattan project, world war, master race, ship disappeared, critical mass, war ii, world war ii, aug 6 1945, top secret, experiment government tried, hit atomic bomb, atomic bomb code,
Approximate Word count = 974
Approximate Pages = 4 (250 words per page double spaced)