The Trump administration is reportedly turning to old friends as it looks to develop a “golden dome” missile-defense system proposed by President Donald Trump. Although plans may change, and Elon Musk has denied that SpaceX pitched itself for the job,

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.

The White House’s $175-billion plan to protect the U.S. from nuclear annihilation will probably cost much more—and deliver far less—than has been claimed, says nuclear arms expert Jeffrey Lewis