US foreign policy towards Iraq has caused a growing split between nations like France and Germany that are defending a narrower European interest and those looking to a broader North Atlantic alliance. Former diplomat and current conservative think-tanker Robert Kagan discusses the diverging interests of US and Europe, Of Paradise and Power. Plus, National Book Award winner Gore Vidal examines President Bush’s foreign policy and the history of America’s imperial ambitions, from WWII to the present, Dreaming War. Andro Linklater tells the story of America’s struggle to standardize measurements. Then, Mario Livio explores the never-ending number Phi, The Golden Ratio.