Drawing on misplaced Islamic idealism, the terrorist attacks of Sept. 11, 2001, used 19 men to hijack four planes across the United States.
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Pakistani-Kuwaiti
Khalid Shaikh Mohammed, shown here after his capture in March 2003, is considered the al Qaeda mastermind behind planning the terrorist attacks of Sept. 11, 2001. The man also has been linked to the videotaped beheading of journalist Daniel Pearl. (AP)
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