3D Printing in Africa

Are we in the midst of the next printing revolution? Technology experts are already excited about so-called 3D printing. Basically a printing machine reads designs you've made on your computer, and can then print the physical object out, eliminating the need for workshops or factories.. And they can make all sorts of things cheaply ... from machine tools to jewellery , guns and even prosthetic limbs. Is this just hype? Plus, a visit to the lab of an entrepreneur in Togo who has invented the first African 3D printer.