This second edition of a critical volume explores religious connections and extremist factions both at home and abroad. Organizations discussed include Wahhabi, Hamas, and the Muslim Brotherhood. Packed with case studies and detailed scenarios, the book highlights the vulnerability of transportation systems of all sorts. It explains how both terrorists and law enforcement can use the internet, and includes a contact list, a glossary of Islamic and cyber terrorist terms, and a chapter on understanding and anticipating terrorist behavior. The book stresses the importance of professionally analyzed intelligence and cross-agency communication in effectively fighting terrorism.