An al Qaeda video marking the anniversary of the September 11 attacks has appeared on the Internet more than a week late due to technical problems.

The delay of the much-touted 87-minute video, caused in part by the main Islamist websites crashing, has thwarted al Qaeda’s yearly celebration of its attacks on U.S. cities in 2001.

Parts of the video — a compilation of documentary footage and messages by al Qaeda leaders — were aired on September 8 by Al Jazeera television, which did not say how it obtained it.

But the full version hit websites on Friday, eight days after the anniversary.

On it, senior al Qaeda commander Mustafa Abu al-Yazid vowed that Western forces in Afghanistan would face “more large-scale attacks … where they least expect it” and called for militants in Pakistan to step up their fight.