1. July 16, 1945 the U.S detonates the first A-bomb in New Mexico. They called this the “Trinity Test.” USA exploded the H-Bomb on November 1, 1952. On January 31, 1950, President Truman announced his decision on the hydrogen bomb. On August 6, 1945 the U.S dropped the “Little Boy” on Hiroshima and on August 9 dropped the “Fat Man.” First Soviet bomb was detonated on August 29, 1949. USSR tested the H-Bomb on August 12, 1953. U.S launched their first satellite into space on January 31, 1958. The Soviet Union successfully launched Sputnik I on October 4, 1957. The R-7, was successfully tested in August 1957 became the world's first ICBM. Bib.

2. “Trinity Test” Trinity was the first test of technology for an atomic weapon. It was conducted on July 16, 1945, near Alamogordo, New Mexico. The weapon's codename was "The Gadget". The detonation was equivalent to the explosion of 20 kilotons of TNT and is considered the beginning of the Atomic Age. Bombing Japan President Harry S. Truman ordered the U.S. dropping of the nuclear weapon "Little Boy" on the city of Hiroshima on Monday, August 6, 1945, followed by the detonation of "Fat Man" over Nagasaki on August 9. These are the only attacks with nuclear weapons in the history of warfare. 6 days after the detonation over Nagasaki, Japan announced its surrender to the Allied Powers, signing the Instrument of Surrender on September 2, officially ending the World War II.

3. The Soviet Union was working furiously to build their own atomic weapons. Americans predicted the USSR would not have nuclear weapons until the mid-1950’s. Soviet Union shocked the entire world when the first Soviet bomb was detonated on August 29, 1949. It’s code name was “First Lightning” It was a copy of United State’s “Fat Man.” Scientific research for “First Lightning” was directed by nuclear physicist, Igor Kurchatov.

4. United States On November 1, 1952 the US explodes the H-Bomb on the Marshall Islands in the Pacific Ocean. Soviet Union Detonated its first hydrogen bomb at the Semipalatinsk test site in Kazakhstan. It’s explosive power is comparable to 400 kilotons of TNT, and is 26 times more powerful than the “Little Boy” atomic bomb. The hydrogen bomb was the world’s first thermonuclear weapon. 6 countries in the world are known to own the weapon: United States, USSR, Great Britain, France, China, India

5. Soviet Union successfully launched Sputnik I on October 4, 1957. It marked the start of the U.S-USSR space race Soviets struck again on November 3 when they launched Sputnik II, including a dog named Laika. Explorer I was the first American satellite, launched January 31, 1958. Launched at Cape Canaveral Air Force Station in Florida. It was built by the Jet Propulsion Laboratory. Explorer I was 6 feet long, 31 pounds, and about 1/36 the size of the Soviet’s Sputnik 2. Sputnik I

6. When Sputnik was launched, the world had a fear of a missile attack. ICBM(Intercontinental Ballistic Missile) was designed for nuclear weapons delivery. In an all-out nuclear war, land based ICBMs would carry most of the destructive force. American Intelligence estimated that in a Russian missile attack, 20 million Americans would die and 22 million would be injured.

7. Have you ever wondered what would happen if a nuclear bomb would go off in your city? A mapplet called Ground Zero shows the thermal effects of various well-known nuclear devices when dropped on any part of the world. Click on the picture to the left to find out what would happen to your home!

8. Click on the picture to watch a video of the “Trinity Test” being conducted. Click on the picture above to watch a video of the first H-Bomb.

9. "Cold War Timeline." History Timelines. Web. 19 Feb. 2010.. "Atomic bombings of Hiroshima and Nagasaki -." Wikipedia, the free encyclopedia. Web. 19 Feb. 2010.. "Sputnik." History Home. Web. 23 Feb. 2010.. "Explorer 1 - First American Satellite." Space Projects - Space Information - Space Shop. Web. 20 Feb. 2010.. Infoplease: Encyclopedia, Almanac, Atlas, Biographies, Dictionary, Thesaurus. Free online reference, research & homework help. Infoplease.com. Web. 21 Feb. 2010.. "YouTube - The first atomic bomb explosion :Trinity test 1945." YouTube - Broadcast Yourself. Web. 24 Feb. 2010.. "YouTube - Nuclear Bomb - First H Bomb test." YouTube - Broadcast Yourself. Web. 24 Feb. 2010..