The point has been made that Mohammed taught that an enemy should be invited to join Islam before launching an attack- invitations that have been made by Iranian despot Ahmadinejad and also by al-Zawahiri and American traitor Adam Gadhan.
Al-Zawahri spoke in the third and longest video, warning Americans of more attacks to come.
"We have repeatedly warned you and offered a truce with you. Now we have all the legal and rational justification to continue to fight you until your power is destroyed or you give in and surrender," he said. "The days are pregnant and giving birth to new events."
The indispensable Jihad Watch has more.
Remember that- the choice that Al Qaeda is offering us is surrender or destruction.