Marvin Kalb, former CBS Moscow bureau chief, traces how the Crimea of Catherine the Great has become a global tinder box, leading to a bloody civil war in Ukraine and a new Cold War between East and West. Kalb argues that the post-cold war world today hangs on the resolution of the Ukraine crisis. So long as it is treated as a problem to be resolved by Russia, on the one side, and the United States and Europe, on the other, it will remain a danger zone with global consequences.