How many hijacked airplanes were used in the September 11 attacks?
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Which terrorist organization was responsible for planning and executing the September 11 attacks?
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What was the name of the United Airlines flight that crashed in Shanksville Pennsylvania after passengers attempted to retake control from hijackers?
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Which building of the U.S. military was struck by American Airlines Flight 77 on September 11?
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How many floors did each of the Twin Towers of the World Trade Center have before their collapse?
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Which U.S. president addressed the nation on the evening of September 11 2001?
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Approximately how many people were killed in the September 11 attacks?
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What was the name of the military operation launched by the United States in Afghanistan in October 2001 in response to the September 11 attacks?
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Which major piece of legislation expanding U.S. government surveillance and law enforcement powers was passed in October 2001 following the September 11 attacks?
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In which year did Osama bin Laden die in a U.S. military raid in Pakistan?
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