The Bin Laden Tapes
Osama bin Laden has delivered 23 authenticated messages since Sept. 11, 2001. His first video after the attacks was broadcast by al-Jazeera on Oct. 5, 2001. His last was Oct. 29, 2004. Since then, he has released only audiotapes, the latest posted online on June 30, 2006, encouraging Sunnis to retaliate against Shiites in Iraq.