It would be the equivalent of us going back 1,000 years and having to start from scratch." In response to these hypothetical - but experts say quite possible - threats, US President Donald Trump has set his eyes on a "next generation" missile shield: the Golden Dome.

Among a flurry of executive actions, Mr. Trump directed the nation’s nuclear safety regulator to speed up approvals for new reactors.

Even as Apple has been shifting some of its manufacturing and supply-chain strategies for the iPhone in response to US-imposed tariffs against China, the world's biggest tech company has another tariff issue it may need to content with.