According to American counter-terrorism analysts the Al-Matar complex was an Afghan training camp run by al Qaeda.
[1] In 1999, Mohammed Atef met repeatedly with Bin Laden and Khalid Sheikh Mohammed at the Al-Matar complex to discuss possible targets for the September 11 attacks.
[2] According to testimony offered at the trial of Zacarias Moussaoui, Abu Turab al-Urduni—the son-in-law of Ayman al-Zawahiri—provided training to the "muscle" hijackers at the al-Matar complex.
[3] He was alleged to have provided training in how to disarm air marshals, in physical fitness and in basic English phrases.
Mohammed Zarnuki's Summary of Evidence memo asserted:[1] Faiz Mohammed Ahmed Al Kandari faced the allegation:[4]