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.

A new defense initiative aimed at intercepting missiles before they can hit the U.S. has been announced, but how will this Golden Dome work?

President Donald Trump has announced the concept he wants for his future Golden Dome missile defense program — a multilayered system that for the first time will put U.S. weapons in space.