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Panama Canal opens. Importance: Made travel easier for countries.
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The Star-Spangled Banner is adopted as the United State's national anthem. Importance: The song will now be used as the nation's song.
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The Philippines become an independent republic. Importance: The Philippines were an American owned land up to this day.
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Alaska becomes the 49th state. Importance: America expands it's land ownership to Alaska.
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Statue of Liberty is dedicated to the US by Spain. Importance: The statue now became and American symbol.
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Two hijacked jetliners ram twin towers of World Trade Center in worst terrorist attack against U.S.; a third hijacked plane flies into the Pentagon, and a fourth crashes in rural Pennsylvania. Importance: put US into war with the Middle East.
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President Bush signs legislation creating a new cabinet department of Homeland Security. Importance: This made the country more secure and safe against terrorist attacks.
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Space shuttle Columbia explodes upon reentry into Earth's atmosphere, killing all seven astronauts on board. Importance: Changed the outlook of traveling to outer space.
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Hurricane Katrina wreaks catastrophic damage on Mississippi and Louisiana; 80% of New Orleans is flooded. Importance: Mass murderer and brought the country more together to help out the victims.
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The very first man to walk on the moon dies of heart issues. Importance: Death of the first person to walk on the moon.