Libraries Make Space For 3-D Printers; Rules Are Sure To Follow

At hundreds of libraries across the U.S., 3-D printers can sometimes be heard whirring in the background, part of an effort to encourage interest in the new technology and foster DIY "maker spaces." In some libraries, officials have begun to set restrictions on the 3-D printers amid concerns about how they'll be used. At the University City Public Library in St. Louis, Patrick Wall recently printed a green plastic sword from the game Minecraft.