3,500 Suspected Terrorists In UK

What is the latest on the Manchester concert bombing? How should the United States respond? Did the terrorist act alone? What should authorities do with the 3,500 potential terrorists they are monitoring? And what message is President Trump sending by calling terrorists "evil losers"? Dan & Amy talk counterterrorism with Khalil Marrar, Terrorism Expert, Professor & Researcher of Public Policy, Administration & Middle East Politics at Governor’s State University.