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Ronald Reagan was inaugurated as the 40th president of the United States of America on January 20, 1981.
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John Hinckley Jr. shot President Reagan in the chest on March 30, 1981, but Reagan survived.
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Sandra Day O'Connor became the first woman to be sworn in as a Supreme Court justice on September 25, 1981.
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The United States invaded Grenada to take down a Marxist faction in the government of Grenada on October 25, 1983.
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The space shuttle known as the Challenger exploded 73 seconds after launch on January 28, 1986. All seven crew members were killed in the explosion.
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President William J. Clinton became the second president to be impeached by the House of Representatives on December 19, 1998.
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George W. Bush was inaugurated as the 43rd president of the United States of America on January 20, 2001.
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On September 11, 2001, two hijacked planes crashed into the Twin Towers. A third hijacked plane crashed into the Pentagon, and a fourth hijacked plane crashed in a rural area in the state of Pennsylvania.