This book provides an overview of deceptive techniques, how they work and how they can be defeated. In this era of persistent conflict, U.S. national security depends on the diplomatic, informational, military, and economic instruments of national power being balanced and operationally integrated. A single instrument of power?that is, one of the country's security departments and agencies acting alone?cannot efficiently and effectively deal with the Nation's most important security challenges. None can be resolved without the well-integrated use of multiple instruments of power?a team bringing to bear the capacity and skills of multiple departments and agencies. The requirement for better interagency integration is not, as some have argued, a passing issue temporarily in vogue or one tied only to counter-terrorism or foreign interventions in failed states.