On July 25, 1946, the first underwater nuclear explosion was conducted at a depth of 27 meters in the Bikini Atoll lagoon, shortly after the end of World War II. The over 100 indigenous residents of Bikini Atoll were relocated to other islands to facilitate the nuclear testing. | History In Pictures

President Donald Trump announced the United States' intention to restart testing nuclear weapons "on an equal basis" with Russia and China. CNN's Nic Robertson looks at the history of nuclear weapons testing in the US and explains what that would mean politically. Read more: https://cnn.it/4358PyY | CNN