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9/11 conspiracy theories

Theories on 2001 terror attacks in U.S.The nature of the collapse of the two World Trade Center towers and the nearby 7 World Trade Center (in this photo, the brown building to the left of the towers) is a major focus of 9/11 conspiracy theories.Various conspiracy theories attribute the preparation and execution of the September 11 attacks against the United States to parties other than, or in addition to, al-Qaeda.

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