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  World War I began when the Archduke Franz Ferdinand was shot.
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  National Council for Social Studies was founded to provide instruction for teachers of social sciences.
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  The Stock Market crashed causing years of economic problem for American families.
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  World War II begins when Germany (lead by Hitler) invades Poland.
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  Pearl Harbor VideoJapan attacks Pearl Harbor. The United States becomes involved in World War II after this.
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  War breaks out when North Korean soldiers invade South Korea. The USA intervenes on South Korea's behalf.
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  The Civil Rights Movement was an era of gaining equality and rights for African American citizens in America. Rosa Parks, Martin Luther King Jr., and Malcom X were all leaders.
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  Russia launches the first satellite into space. (Image Source: http://en.wikipedia.org/wiki/Sputnik_1)
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  A large percentage of the American public did not support this cause. Many people protested and rioted.
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  The Race to Space starts when Yuir Gagarin is the first man to orbit the Earth. (Image source: http://www.inyourpocket.com/russia/Moscow/Yuri-Gagarin_72055f)
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  Neil Armstrong lands on the moon and "takes one small step for man, one giant leap for mankind." (Image Source: http://www.dailymail.co.uk/news/article-2193737/They-man-moon-Astonishing-images-Apollo-11-mission-reveals-Neil-Armstrong-history.html)
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  Nixon supporters break into the Democratic national party's headquaters to bug phones and steal documents. This event eventually leads to President Nixon's resignation.
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  An act of Congress that requires schools to administer standardized tests and make academic improvement in order to recieve federal funds.
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  The World Trade Center in New York is attacked when Islamic terrorists hijack two plans and crash them into the two twin towers.