"You’re going to try out something like this before you base a whole terrorist campaign on it," I explain. "Pick some limited social group that’s as parallel as possible to the society you’re eventually going after, then put the scheme through its paces. Work the bugs out early." I shrug. "And why not a gang? It’s a tight-knit but socially heterogeneous group—the Cutters are, at least—and best of all, mainstream society’s not going to pay much attention."