In the age of global terrorism, the possibility that nuclear weapons might fall into the wrong hands poses a major threat to security. This book traces the history and development of nuclear weapons and the superpower arms race of the Cold War. It analyzes the dangers of nuclear proliferation as increasing numbers of countries aspire to become nuclear powers. Features accessible text, full-color photographs, hypothetical What Would You Do? questions, up-to-date charts, a glossary, and a list of resources for further study.