Globalization and new technologies have shifted the world economy in a seismic fashion. Unfortunately, these factors have also become force multipliers for those dedicated to destroying America. This eye-opening text covers the historical evolution of Homeland Security, reveals the shifting nature of the threats facing our nation, and examines the methods the U.S. has chosen to deal with and resolve these threats. Examining the subject from both an academic and applied perspective, the authors draw on their extensive military, law enforcement, and Homeland Security experience to address the critical issues that threaten security here at home.