Castle Bravo was the first in a series of high-yield thermonuclear weapon design tests conducted by the United States at Bikini Atoll, Marshall Islands, as part of ‘Operation Castle’.

The operation’s ultimate objective was to test designs for a powerful nuclear weapon that could be delivered by aircraft.

Detonated on March 1st 1954, Castle Bravo remains the most powerful nuclear device detonated by the United States.

Read more