The aftermath of Nuclear bombs is compared in the chart above. Seems like the mushroom cloud created from the fat man atomic bomb dropped on Hiroshima would pale in comparison to the expected results of todays nuclear bombing power from around the world.
The Soviets Tsar Bomba ringing in at 50 megatons would be something of epic destruction. The cloud it would create would reach far into space. What a sight that would be to witness from a space shuttle.
Nuclear weapons technology has advanced so much in the last 2 decades that every military must and does have their own bombs. Scary to think the whole world could be wiped clean destroying human kind as we know it.
See also.. .
Explosives, bombs and weapons of mass destruction