Home to some of the world's rarest pieces of art, London's Victoria & Albert (V&A) museum has just added a modern, yet controversial piece to its collection: the world's first 3D-printed weapon. The museum has managed to get its hands on the two prototype Liberator pistols which were successfully fired by their creator Cody Wilson back in May, offering London's culture lovers the chance to view the original $25 do-it-yourself plastic fir