The other al-Qaeda members who allegedly attempted, but were not able, to take part in the attacks were Saeed al-Ghamdi (not to be confused with the successful hijacker of the same name), 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, and Saud al-Rashi.
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The Saudi novelist Abdullah Thabit has written a bestselling novel titled Terrorist Number 20 (2006).
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On August 17, 2001, Zacarias Moussaoui, the so-called “20th hijacker” of the September 11, 2001 attacks, was arrested after an instructor at Pan Am International Flight Academy became suspicious of him.