9/11 Commission Report (PDF), su gpoaccess.gov, American government, 26 novembre 2002. URL consultato il 21 aprile 2008 (archiviato dall'url originale il 23 aprile 2016).
«he traveled to Peshawar, where his brother Zahid introduced him to the famous Afghan mujahid Abdul Rasul Sayyaf, head of the Hizbul-Ittihad El-Islami (Islamic Union Party). Sayyaf became KSM’s mentor and pro-vided KSM with military training at Sayyaf ’s Sada camp.»