WASHINGTON (Reuters) -U.S. President Donald Trump's Golden Dome missile defense concept revives a controversial, decades-old initiative whose ambitious construction could upend norms in outer space and reshape relations between the world's top space powers.

President Donald Trump has laid out new details of his ambitious plan to build a “Golden Dome” missile system to protect the United States from foreign attacks, saying it will be complete before he leaves office.

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,