Al Qaeda tapes at a glance:
— Dec. 13, 2001: U.S. Defense Department releases videotape of Usama bin Laden in Afghanistan on Nov. 9, 2001, saying the destruction of the Sept. 11 attacks exceeded even his "optimistic" calculations.
— November 2002: Al-Jazeera broadcasts a brief audiotape in which a voice attributed to bin Laden says the "youths of God" are planning more attacks against the United States. U.S. experts say the tape can't be authenticated because of its poor quality.
— Feb. 11, 2003: A voice purported to be bin Laden calls on Iraqis to carry out attacks against Americans and defend themselves against a U.S. attack in a tape broadcast on Al-Jazeera. U.S. counterterrorism officials say the audio message was probably authentic.
— Feb. 13, 2003: An audiotape purported to be of bin Laden reads a poetic last will and testament in a recording first obtained by the British-based Islamic Al-Ansaar news agency. Bin Laden says he wants to die a martyr in a new attack against the United States.
— April 7, 2003: In an audiotape obtained by The Associated Press in Pakistan, bin Laden exhorts Muslims to rise up against Kuwait, Saudi Arabia and other governments it claims are "agents of America," and calls for attacks against U.S. and British interests. The CIA determines the 27-minute tape is likely authentic.
— Sept. 10, 2003: In the first video image of bin Laden in nearly two years, he is shown walking through rocky terrain with top deputy Ayman al-Zawahri. Two taped messages accompanied the video In one, a voice purporting to be bin Laden's praises the "great damage to the enemy" on Sept. 11 and mentions five hijackers by name. In the other tape, a voice said to be that of al-Zawahri threatens more attacks on Americans.
— Jan. 4, 2004: A speaker thought to be bin Laden says on an audiotape broadcast on Al-Jazeera that the U.S.-led war in Iraq is the beginning of the "occupation" of Persian Gulf states for their oil. He calls on Muslims to keep fighting a holy war in the Middle East. Officials say it is probably authentic.
— April 15, 2004: A man identifying himself as bin Laden offers a "truce" to European countries that do not attack Muslims. It vows revenge against the United States for the Israeli assassination of Hamas founder Sheik Ahmed Yassin.
— May 6, 2004: An online audiotape released on Islamic forums with the purported voice of bin Laden offers rewards of gold for the killing of U.S. and U.N. officials.
— Oct. 29, 2004: Al-Jazeera airs a video of bin Laden saying the United States can avoid another Sept. 11 attack if it stops threatening the security of Muslims.