The clips were taken in 1953, 1955 and 1958 on Enemen Island, which lies between Hawaii and the Philippines. The recordings are part of an archive of 750 videos taken by the US Government, which are now declassified. In the three videos, the Pacific Ocean is engulfed in huge mushroom clouds, which emit a bright light. It comes as North Korea threatened to conduct weekly missile tests as tensions with the US threaten to boil over.
How clean is the Pacific Ocean?