It’s official: Iran doesn’t have the nuclear bomb. But who does? The United States, Israel, Pakistan, India and five other countries. We speak with Jonathan Schell, author of “The Seventh Decade: The New Shape of Nuclear Danger.” Schell argues that the Bush administration has ushered in a new nuclear age. With a concurrent first-strike policy, a weapons buildup at home and a reduction in monitoring and negotiations, Schell says the White House has encouraged proliferation around the world. [includes rush transcript]