look at this. look at me. what? hello? hello? welcome back to the lead. 3d printers can crank out everything from cars to guns and put the president or your favorite cnn news anchor in the palm of your hands. the world was stunned after the smithsonian released the presidential portrait and the scientifically correct that you will be able to re-create for yourself at home along with dinosaur fossils. and the only thing more fascinating than the finished products is how the wizards behind this technology pull it off. ♪ ♪ >> the world was amazed when the smithsonian institution went public with this bust and face mask of president obama just a few days ago. these are aren't interpretations. these are not a sculptor's rendering, these are digital