Castle Bravo nuclear blast 15Mt March 1, 1954

Castle Bravo nuclear blast 15Mt March 1, 1954

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