United States’ gravest security threat is global climate change

PLANNING. It is the key to successful military action — and, in many ways, to success in general — and US Marines like me pride ourselves on it.
But if you’ve spent 30 years in the military, as I have, you know that an effective plan cannot be static; operating environments change, often in surprising or unexpected ways. Donald Trump’s victory in the US presidential election earlier this month constitutes just such a change.