Trump unveils plans for $175B 'Golden Dome' missile defense shield

President Donald Trump on Tuesday unveiled plans to begin building a sophisticated new missile defense shield that could intercept threats from space, estimating the endeavor would cost some $175 billion and become operational in three years.

The project "Golden Dome," which will be led by Space Force Gen. Michael Guetlein, echoes President Ronald Reagan's failed "Star Wars" program, which was criticized for being overly ambitious and siphoning money away from other national priorities. The White House cited advancements in technology as a reason why some of Reagan's vision was now possible.