Castle Bravo was the code name given to the first US test of a thermonuclear hydrogen bomb device, detonated on Mar 1, 1954, at Bikini Atoll, Marshall Islands.

It was the most powerful nuclear device ever detonated by the US with a yield of 15 Megatons. That yield, far exceeding the expected yield of 4 to 6 megatons, combined with other factors to produce the worst radiological accident ever caused by the US.

Beautifully crafted and presented clip.

http://www.blogiseverything.com/interesting/size-comparison-of-nuclear-bombs/

Bravo was small compared to Tzar Bomba

http://en.wikipedia.org/wiki/Tsar_Bomba

http://www.nuclearweaponarchive.org/Russia/TsarBomba.html

@Skwirlinator

Bravo was small compared to Tzar Bomba

Good sites.

Tzar Bomba. Developed by the Soviet Union, the bomb was originally designed to have a yield of about 100 megatons of TNT; however that was reduced by half in order to limit the amount of nuclear fallout that would result.