20th Hijackers:
Ramzi bin al-Shibh
Mohamed al-Qahtani
Zacarias Moussaoui
Saeed al-Ghamdi Tawfiq bin Attash
Ali Abdul Aziz Ali
Mushabib al-Hamlan
Zakariyah Essabar
Saeed Ahmad al-Zahrani
Ali Abd al-Rahman al-Faqasi al-Ghamdi
Saeed al-Baluchi
Qutaybah al-Najdi
Zuhair al-Thubaiti
Saud al-Rashi
Fawaz al-Nashimi
Source: Wikipedia
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