A new tape by Al Qaeda's Ayman al-Zawahiri calls for reprisals in Europe, where officials see increasing terrorist activity and anger over provocative depictions of Islam.
The latest audio message from No. 2 Al Qaeda leader Ayman al-Zawahiri signals growing doubt among supporters, experts say.
Messages from Osama bin Laden and Ayman al-Zawahiri step up the network's rhetoric on Gaza and the European media.
Concerns grow over inadequate US military intelligence about Taliban and Al Qaeda militants in Pakistan
New software combs for clues in al Qaeda tapes, Harry Potter pages, and celebrity waistlines.