The trends, data, and battle-tested logic don't lie. A perfect storm of extremist ideologies is on the horizon that threatens to challenge the current state of public safety-forcing police chiefs, public administrators, and security professionals to rethink their approach to policing the streets of America. Professor James Pastor, a recognized authority on policing and security, draws on three decades of experience fighting on the front lines against domestic terrorism to identify key indicators that point to an increase in extremist violence and terrorist threats here at home.