The Atomic Bomb

An Atomic Bomb uses atom collisions to cause a massive explosion. The idea of an atomic bomb was suggested by Albert Einstein to FDR. This was one of the most controversial issues of WWII and is still debated today. This killed many innocent people and most of the city of Hiroshima. It was dropped on the city on August 6, 1945, by the United States Air Force. 60,000 to 70,000 people were killed in the initial explosion, and it destroyed 10 sq. km. of the city (68%).
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The explosion of the first nuclear bomb

The Creation of the Bomb

By 1945, America had been involved in the fighting of World War II for about 4 years. There had been many battles and many casualties. In 1939 Albert Einstein sent a letter to Franklin Deleanor Roosevelt warning of the development of other atomic bombs in other countries. By 1942, the US had started to build its own nuclear weapon of mass destruction powered by the fission of uronium atoms. American physicist J. Robert Oppenheimer built the first bomb under the rule of U.S. Army Brigadier General Leslie R. Groves. It was first tested in Alomogordo, New Mexico on July 16, 1945.
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A picture of General Leslie R. Groves

The First Bomb

Te first bomb was released on Hiroshima on August 6, 1945. This was the first atomic bomb to be released in warfare. The bomb resulted in a massive explosion that destroyed nearly everything and everybody in Hiroshima. The bomb was nicknamed "Little Boy". It was the first of two atomic bombs used against Japan and had a much more devastating effect than the second.

Second Bomb

On August 9th, America fired another atomic bomb on the city of Nagasaki. This bomb was nick-named the "Fat Man", and killed approximately 40,000 people. This led to Japan's signing of the Allied Terms of Surrender on August 14th of that same year. This bomb as well as the bomb used against Hiroshima were the only bombs to ever be used in warfare. After the war many other countries began making nuclear facilites.

Bombs In Other Countries

The United States, the United Kingdom, Russia, France, India, China, North Korea and Pakistan are the only countries that have admitted to having nuclear weapons at one point in time. In 1994, the US and North Korea agreed that North Korea would get rid of all of it's nuclear facilties if America would take North Korea off of its dangerous countries list. The US failed to stick to their side of the bargain and North Korea conducted a test on October 16, 2006 with a nuclear bomb. There are many laws on uses of nuclear weapons.

In Conclusion

The creation of this bomb was not only important to history, but also to science. It was one of the prime components to winning the war in Japan and ending their invasion of western Europe. It is still debated whether it was worth all of the innocent lives lost and all of the property damaged just to harm Japan. Since this time, nuclear warfare has been a large threat. Both Little Boy, and Fat Man played a large part in ending a war, as well as creating threats of new, deadlier wars in years to come due to the progression of nuclear weapons.


Garraty, John A. The Story of American. Austin, TX: Holt, Rinehart and Winston, 1994.

MSN Encara Reference Library

The Atomic Bomb, January 20, 2009