Science writer Mary Roach explores the curious science of humans at war in her new book, 'Grunt.' She talks about traveler's diarrhea, medical maggots, and stink bombs, and new scientific developments that help keep soldiers safe. Also, we hear an excerpt of our 1980 interview with G. Gordon Liddy, and jazz critic Kevin Whitehead reviews 'Cuong Vu Trio Meets Pat Metheny.'
