Purported Bin Laden Tape Warns U.S.

Al-Jazeera has aired an audiotape purportedly from Osama bin Laden, saying al-Qaida is making preparations for attacks in the United States but offering a truce to rebuild Iraq and Afghanistan.

U/D: 02:23
The CIA has authenticated the voice on a tape played by al-Jazeera as Osama bin Laden, an agency official said.