The U.S. develops the first nuclear weapons through the Manhattan Project during WW2.
The U.S. drops a uranium bomb over the Japanese city of Hiroshima killing more than 140,000 people.
The U.S. drops a second plutonium bomb over Nagaski, about 74,000 people died by the end of 1945.
The U.S. explodes the first hydrogen bomb at Enewetak Atoll in the Marshall Islands. It is 500 times more powerful than the Nagasaki bomb.
SU explodes a nuclear weapon named "First Lightening" in Semipalatinsk, Kazahkstan. Second nation to successfully test a nuclear device.
SU exploded its first true hydrogen bomb at the Semipalatinsk test site.
U.S. announces it intends to launch the first artificial satellite in outer space.
American send their man John Glenn to orbit around the Earth.
Neil Armstrong takes his first steps on the moon. Achieving victory for America witnessed by 723 million people.
Soviet launch Spuknik 1 into space. This captures the world's attention and strikes American confidence hard.