The 3D-Printed Gun Threat Is Getting Weird and Scary

A London student was just convicted for using a 3D printer to make a gun--but not just something that looks like a gun. On Wednesday, Tendai Muswere pleaded guilty to manufacturing a lethal firearm with a 3D printer. The weapon in question resembles a pepper-box revolver, popular in early 19th century America. Muswere...