The United States, Soviet Union, Britain, France and China all scrambled to develop ever more powerful nuclear weapons ...

By Brad Lendon, CNN (CNN) — As the world marks the 80th anniversary of the first use of a nuclear weapon, on the Japanese city of Hiroshima near the end of World War II, the planet is closer to ...

As the world marks the 80th anniversary of the first use of a nuclear weapon, on the Japanese city of Hiroshima near the end ...

By Brad Lendon, CNN (CNN) — As the world marks the 80th anniversary of the first use of a nuclear weapon, on the Japanese city of Hiroshima near the end of World War II, the planet is closer to ...