popsci.com: “A robber is cornered in a dead-end alley. He turns to face the police officer pursuing him, ready to fight. He pauses. The officer’s left forearm is encased in ballistic nylon, and half a million volts arc menacingly between electrodes on his wrist. A green laser target lands on the robber’s chest. He puts his hands up; it’s a fight he can’t win.”
