Your request is being processed... Five-Year Intelligence Assessment: Terror Threat Driven By Instability In Middle East, Africa

The al-Qaida terrorist network continues to focus on U.S. attack targets vulnerable to massive economic losses, casualties and political "turmoil," the assessment said.

Earlier this month, Homeland Security Secretary Michael Chertoff said the threat posed by weapons of mass destruction remains "the highest priority at the federal level." Speaking to reporters on Dec. 3, Chertoff explained that more people, such as terrorists, will learn how to make dirty bombs, biological and chemical weapons. "The other side is going to continue to learn more about doing things," he said.

Marked "for official use only," the report does not specify its audience, but the assessments typically go to law enforcement, intelligence officials and the private sector. When determining threats, intelligence officials consider loss of life, economic and psychological consequences.

Intelligence officials also predict that in the next five years, terrorists will try to conduct a destructive biological attack. Officials are concerned about the possibility of infections to thousands of U.S. citizens, overwhelming regional health care systems....