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.

Washington, D.C., February 29, 2024 - Seventy years ago, on 1 March 1954 (28 February in Washington), the U.S. government detonated a thermonuclear weapon, code-named “Shrimp,” on …

Aug 16, 2018 · The most powerful nuclear explosion in history was the Tsar Bomba, detonated by the Soviet Union on 30 October 1961 over the Mityushikha Bay nuclear testing range in the Arctic Sea. …

On March 1, 1954, the United States carried out its largest nuclear detonation, “Castle Bravo,” at Bikini Atoll in the Marshall Islands. The Bravo explosion was more than two and a half times greater than …

Feb 27, 2014 · Castle Bravo was the first deliverable thermonuclear device, and the test aimed to pave the way for the creation of more effective weapons, including weapons that could be deliverable by...

Learn about Castle Bravo, the largest U.S. nuclear test that exceeded expectations with a 15-megaton yield and caused widespread fallout at Bikini Atoll.

Operation Castle was a series of high-yield hydrogen bomb tests in 1954, aimed at developing deliverable thermonuclear weapons. The Castle Bravo shot was the first test of a dry-fuel hydrogen …

For the people of the Marshall Islands, that day on March 1 1954, will forever be known as Remembrance Day – the anniversary of Castle Bravo, the largest ever nuclear weapons ‘test’ …

May 17, 2006 · Due to the current lithium-6 shortage, several weapon designs tested in Castle therefore used only partially enriched, or even unenriched lithium. The Shrimp device tested in Bravo was a 15 …

Oct 18, 2025 · Castle Bravo was a U.S. hydrogen bomb test conducted on March 1, 1954, at Bikini Atoll in the Marshall Islands. It was the most powerful nuclear device ever detonated by the U.S.