Courier who led to bin Laden was involved in 9/11

According to WikiLeaks reports, Abu Ahmad al-Kuwaiti, the courier whose trail led right to Osama bin Laden's Pakistan compound, provided computer training for the 9/11 hijackers.
Information on a monitored phone call between bin Laden and Kuwaiti that led the US to the Al-Qaida leader was revealed Monday by a US official.