A global history of U.S. nuclear espionage from its World War II origins to today's threats from rogue states. For fifty years, the United States has monitored friends and foes who seek to develop the ultimate weapon. Since 1952 the nuclear club has grown to at least eight nations, while others are making serious attempts to join. Each chapter chronologically focuses on the nuclear activities of one or more countries, intermingling what the United States believed was happening with accounts of what actually occurred in each country's laboratories, test sites, and decision-making councils....