In a video aired on Al Jazeera, Osama bin Laden’s top deputy, Ayman Al-Zawahri, vowed that Al Qaeda would continue to fight the U.S. until Washington changed its policies. Al-Zawahri said “We are a nation of patience, and we will continue fighting you until the last hour.” NBC reports that Al Qaida has carried out major attacks following broadcast statements by al-Zawahri on seven previous occasions.