Tsar Bomba was a three-stage device ... The Soviet plane simply would not have had the fuel range to make it from the USSR to the United States with the bomb strapped to its fuselage.

And all this came from a 1.4 megaton bomb. Tsar Bomba, which was the largest nuclear bomb that has ever been detonated, was 50 megatons. So what would happen if we detonated that above the United ...