Yesterday US President Donald Trump left the globe on the brink of World War 3 after boasting his nuclear button is "much bigger and better" than rival leader Kim Jong-un's.
It was prompted by Kim's speech earlier in the day when he said the US was "within range" of North Korea's nukes – and a nuclear button is always on his desk.
And little over a month ago, the communist state tested a Hwasong-15 missile, boasting it can reach US mainland and is its most powerful yet.
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As the macho posturing edges us closer to nuclear doom, leading strategic consultant, David Morey, says mass casualties would occur in days.
He also warned that over one trillion dollars – around £736bn – would be spent.
He told Fox News: "There is no good option when it comes to North Korea. You can’t ignore them, starve them, destroy them or even negotiate with them.
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"Destroying them would involve – some people think – a trillion dollars and a million lives within the first days of a conflagration on the peninsula. So there’s no good option.
"What we have to do is get really smart, get realistic. It’s unrealistic the sanctions alone will solve the problem."
He added that North Korea will be particular prone to provocation, and the US cannot afford to fire a small missile at its bitter enemy without full-scale conflict.
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Morey continued: "I think even a limited strike by the US can bring a full-scale conflict on the Korean peninsula because all of North Korea’s military has been trained to fire back in any way.
"Even if a small part of North Korea is attacked by the US – given the fact that more than 10 million of the South Korean population lives in a 100-miles range of North Korean artillery and missiles – I think that immediate and automatic response from the North Korean military can create huge human loss on the South Korean side."