"I too have a Nuclear Button, but it is a much bigger & more powerful one than his," stated then-President of the United ...

And I've got my whole shadow cabinet behind me.' Asked about whether he was prepared to push the nuclear button, he added: 'Nobody who aspires to be prime minister would set out the circumstances ...

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"The entire United States is within range of our nuclear weapons, and a nuclear button is always on my desk." he said. North Korea conducted its sixth and most powerful nuclear test in September.

While experts say a nuclear attack is still unlikely, the repercussions would be catastrophic. Here, we reveal what would happen if Putin did push the red button, minute-by-agonising-minute ...