A 3D printer prints an object, during 'Inside 3D Printing' conference and exhibition in New York, April 22, 2013. The exhibition features on April 22-23, 2013, tutorials and seminars offering blueprints on how to invest and utilize 3D printing in coming years, as well as leading manufacturers and developers displaying their latest 3D printers and services. (Photo by Emmanuel Dunand/AFP/Getty Images)