President Trump, flanked in the Oval Office by Defense Secretary Pete Hegseth and several GOP senators, promised a huge windfall for U.S. defense companies today as he officially launched the new Golden Dome program, naming a top Space Force general to manage the ambitious missile defense system, which he predicted would be complete in three years for a total cost of $175 billion. The multilayered system, which will include space-based sensors and interceptors, “should be fully operational before the end...