Israeli leaders say the system isn’t 100% guaranteed, but credit it with preventing serious damage and countless casualties.

US President Donald Trump's plan for a nationwide missile defense system -- dubbed "Golden Dome" -- faces significant technical and political challenges, and it could cost far more than he has estimated to achieve its goals.

The aim is for Golden Dome to leverage a network of hundreds of satellites circling the globe with sophisticated sensors and interceptors to knock out incoming enemy missiles after they lift off from countries like China,