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Originating in U.S. defense networks, the Internet spread to international academic networks, and then to the public in the 1990s, greatly affecting the global economy, society, and culture.
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George Walker Bush is an American politician who served as the 43rd President of the United States from 2001 to 2009.
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Al-Qaeda terrorists struck the World Trade Center in New York City and the Pentagon near Washington, D.C., killing nearly 3,000 people. In response, the United States launched the War on Terror, which included war in Afghanistan and the Iraq War.
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Barack Hussein Obama II is an American politician who served as the 44th President of the United States from 2009 to 2017.
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In 2010, the Obama administration passed the Affordable Care Act, which made the most sweeping reforms to the nation's healthcare system in nearly five decades, including mandates, subsidies and insurance exchanges.
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American forces in Iraq were withdrawn in large numbers in 2009 and 2010, and the war in the region was declared formally over in December 2011.
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In 2014, Obama announced a restoration of full diplomatic relations with Cuba for the first time since 1961.
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Donald John Trump is the 45th and current President of the United States.