It showed an image of Bin Laden wearing the same black beard and clothes as in the most recent video in which he gave an address to the American people urging them to abandon capitalism and democracy and convert to Islam.
Al-Qaeda has previously marked past anniversaries of the 2001 attacks in New York by putting out videos of the last will and testaments of some of the hijackers, usually accompanied by comments by top leaders and documentary-style footage.
"Osama has never been a threat to anyone's security, just for those who are aggressors"
Euhunza, Karachi, Pakistan
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Last year al-Sahab released a 55-minute video with the last testimonies of hijackers Wail al-Shehri and Hamza al-Ghamdi.
The video included old, but previously unreleased, footage showing bin Laden strolling through an Afghan training camp where the attacks were apparently planned.
The tape was accompanied by another with an address by Bin Laden's deputy, Ayman al-Zawahri.