With coompanies like Elon Musk’s Space X lining up to lend a hand and a four-star Space Force general leading the way, the Dome could impact us all

The President announced plans to develop a space-based missile-defense system—but concerns abound, including over costs.

An idea for a space-based boost-phase defence system called Brilliant Pebbles was proposed towards the end of the 1980s. Rather than having large satellites with multiple missiles, it entailed having around 1,000 small individual missiles in orbit. It would have also used about 60 orbiting sensors called Brilliant Eyes to detect launches.