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As the US shivers in the grip of the polar vortex, and people in Britain clear up after once in a generation floods, the debate over climate change is gathering momentum once again. IBM is preparing to invest a billion dollars in Watson - a supercomputer that thinks and learns like a human being. And should people be entitled to time off work if they have suffered a bereavement? We'll be discussing these stories and more with our guests, Brigadier General (rtd) Ron Sconyers, president and CEO of Physicians for Peace, and Tim Charlton, founding Editor of Charltom Media.