UK Universities and Science Minister, David Willetts, becomes his own radio presenter; here, on a tour organised by the UK's Science and Innovation Network, he charts his meetings with scientists and entrepreneurs in Chicago, including discovering how researchers are trying to develop new batteries, he meets MIRA the Argonne supercomputer, attends a synthetic biology convention, talks to technology start-up CEOs, addresses the AAAS fellows forum and talks in depth to his travelling companions, Nottingham chemist Martyn Poliakoff and Edinburgh Vice Prinicipal Mary Bownes...