09/24/2009 05:12 am ET Updated May 25, 2011

Khalid Sheikh Mohammed, 9/11 Mastermind: HIs Days In N.C. 'Helped Propel Him To Terrorism'

Khalid Sheikh Mohammed, known inside the government as KSM, is the archetype of the evil genius, the man whose imagination gave birth to the twisted dream of crashing airliners packed with passengers into buildings packed with workers.

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