More than 2,000 nuclear weapons have been detonated in the past 80 years. Their effects still linger around the world

The United States, Soviet Union, Britain, France and China all scrambled to develop ever more powerful nuclear weapons post-World War II. The legacy of their nuclear testing remains.

​ The United States, Soviet Union, Britain, France and China all scrambled to develop ever more powerful nuclear weapons post-World War II. The legacy of their nuclear testing remains. Read More Breaking News, Latest News and Videos | CNN