When it comes to protecting U.S. territory from missiles fired by such nuclear-powered countries as Russia, China, and North Korea (which is Trump’s goal in ordering this project), something like Iron Dome would have no capability whatsoever; and

President Trump signed an executive order to build an "Iron Dome for America," modeled on Israel’s missile defense system.

An executive order said the United States faced a “catastrophic threat” from advanced aerial weapons. But a defense system like Israel’s may not be feasible in the country, which is more than 400 times larger.