WASHINGTON, Aug. 4, 2005 – President Bush today dismissed al Qaeda leader Ayman al-Zawahiri's threats of more violence targeted toward the United States and Great Britain during a news conference at the president's Crawford, Texas, ranch. Facing reporters alongside Columbian President Alvaro Uribe, who is visiting the United States, Bush said al-Qaeda's goal "is to drive us out of the broader Middle East." During a videotaped broadcast on the Arab television network al-Jazzeera today, Zawahiri - second only to Osama bin Laden in the al Qaeda hierarchy -- allegedly said U.S. troops in Iraq would experience more deadly attacks. Bush...