Operation Hardtack I included many nuclear detonations, but the Umbrella shot stood out for its strange and spectacular underwater effects. Set off in Enewetak Lagoon in 1958, the 8-kiloton blast ...

Nuclear weapons tests are among the most violent events humans can trigger, and that violence leaves fingerprints in the Earth, sea, air, and even in orbit. The physics of shock waves, sound, and ...

This transcript was prepared by a transcription service. This version may not be in its final form and may be updated. Speaker 1: From the opinion pages of the Wall Street Journal, this is Potomac ...