The son-in-law of Ayman al-Zawahiri,[1][2] Abu Turab al-Urduni (Abu Turab the Jordanian[3]) was a Jordanian who has been described by the United States government as one of five individuals who were aware of the operational details of the September 11 attacks, along with Osama bin Laden, Khalid Sheik Mohammed, Ramzi bin al-Shibh, and Mohammed Atef.
[4] He has been described as the trainer of the "muscle" hijackers at the al-Matar complex and training them to disarm air marshals, physical fitness and basic English phrases.
He also prepared them for truck bombing, blowing up buildings, and hijacking trains for operational security, so they wouldn't be able to reveal their target if they were captured.
[6] CNN reports anonymous government sources as believing that Abu Turab Al-Urduni had been killed by U.S. forces during the first stages of the war in Afghanistan.
[6] In September 2006, Abu Turab was shown in a video released by as-Sahab that showed the training and preparations for the 2001 attacks.