President Trump's plan for a "Golden Dome" missile defense system to cover the entire territory of the United States would cost $1.2 trillion to build and operate, according to a Congressional Budget Office (CBO) assessment, dramatically more than the White House has...

President Trump has unveiled his plans to develop a new massive missile defense system to cover the entire territory of the United States, which he has dubbed the "Golden Dome," a project that will almost certainly kick off a new arms race. The president claimed the...