President Obama has declared that the greatest terrorist threat which America faces is attacks by lone wolf terrorists. This volume expands the lone wolf rubric to include autonomous cells: small groups of terrorists who cooperate, but operate independently. The challenge presented by lone wolves and autonomous cells, unlike the threat emanating from established terrorist groups like Al Qaeda, has proven intractable because of the difficulty of gathering intelligence on these actors or effectively countering their actions. Lone wolves operate under the radar, staging deadly attacks such as...