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.

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

The statement came days after Trump signed an order that ”mandated a process to develop an ‘American Iron Dome,’” a next-generation U.S. missile defence shield against ballistic, hypersonic, cruise missile and other forms of aerial attack.