Experts say President Donald Trump's "Golden Dome" will need space-based radars, missile interceptors and laser weapons around the U.S. to defend the country from long-range assault.

SpaceX’s bid to build the ‘Golden Dome’ shield for US president Donald Trump is currently leading the race, and sources say the company is pitching a ‘subscription model’ for missile defence.

Should a group led by SpaceX win the contract, it would be the biggest win for Silicon Valley in the lucrative defense contracting industry.