Khalid Sheikh Mohammed

Khalid Sheikh Mohammed, often known by his initials KSM, is a Pakistani terrorist, mechanical engineer and the former Head of Propaganda for the pan-Islamist militant group al-Qaeda. He is currently held by the United States at the Guantanamo Bay detention camp under terrorism-related charges. He was named as "the principal architect of the 9/11 attacks" in the 2004 9/11 Commission Report.