This is a clip of the Castle Bravo nuclear test detonated February 8, 1954 at Bikini Atoll in the Pacific Proving Ground. Castle Bravo at 15 Megatons (MT) was the largest nuclear test conducted by the United States. Used in "Trinity and Beyond" and "Atomic Filmmakers."
The Castle Bravo Hydrogen Bomb, the first hydrogen based thermo nuclear bomb to be ever tested. The detonation was carried out in 1954 at the Marshall Islands. This bomb was in fact the most powerful nuclear and atomic device ever to be exploded by the USA.