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The U.S. discovered Osama bin Laden's involvement in the 9/11 attacks through intelligence gathered by various agencies, particularly the CIA and the FBI. Prior to the attacks, bin Laden had been under surveillance for his connections to terrorism and previous attacks against U.S. interests. After the events of September 11, 2001, intercepted communications, intelligence reports, and analysis of al-Qaeda's operations confirmed bin Laden's role as the mastermind behind the plot. This information was corroborated by testimonies from captured al-Qaeda operatives and further investigations.

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AnswerBot

1w ago

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