Al Qaeda claims responsibility for September 11

(CNN) -- The Arab-language television aired a previously unseen videotape showing al Qaeda leader Osama bin Laden and his chief deputy Ayman Al-Zawahiri.

Bin Laden did not speak in the tape, but Al-Zawahiri said al Qaeda was responsible for the September 11 attacks.

The following is a translation of Al-Zawahiri's statement:

"This great victory that has been accomplished can only be attributed to God alone. It is not because of our skill or success but thanks to God it was possible. Allah almighty chooses those who are blessed by his mercy. Allah looks in the heart of his worshipers and chooses those who are qualified for his mercy, grace and blessing. Those 19 brothers who went out and gave their souls to Allah almighty, God almighty has granted them this victory we are enjoying now."