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  The first Earth Day was coordinated to celebrate Earth and do things to save our planet.
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  A massacre at Kent State University in Kent, Ohio that killed 4 students and injured 9.
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  Several burglars were arrested inside the Watergate Building in Washington D.C., and many think it was a conspiracy of President Nixon.
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  The Munich Massacre was an attack during the 1972 Summer Olympics in Munich, Germany where 11 members of the Israel team were kidnapped and eventually killed.
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  The last U.S. combat troops leave South Vietnam as the remaining prisoners of war are freed from North Vietnam.
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  President Richard Nixon resigns because he thinks it is the best thing for our country and thinks that we need "healing time."
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  Lynette Fromme tried to assassinate President Ford in Sacramento, California because she wanted to make a statement to people who refused to stop environmental pollution.
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  The book roots is published by Alex Haley, which is about a African American sold into slavery.
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  The first Star Wars movie came out, which is the first of seven.
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  Elvis Presley died at the age of 42 in Memphis, Tennessee because he overdosed on drugs.
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  Pope John Paul II's papacy begin, and went on until his death on April 2, 2005.
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  The Three Mile Island accident with a nuclear meltdown.
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  Margaret Thatcher was elected to be the Prime Minister of the United Kingdom.
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  Sixty-six Americans were held hostage for 444 days after a group of Iranian students took them.