Originally Posted by CyberSEO

Sure there is no proof because nobody does it before (actually who knows, which exactly human generation we are...) When the Soviet Union tested the 50 Mt bomb (an equivalent of 2 "Satan" missiles), they could make it twice more powerful. Krustchev wanted a 100 Mt bomb, but the scientists told him its not a good idea because such an explosion may not stop till it suck out all the oxygen on the planet. That's a historical fact why it was "only" 50 Mt.