President Donald Trump has signed an executive order to forge ahead with an American version of Israel's famed Iron Dome air defense system, although pressing questions remain about how the Republican and his newly installed defense officials plan to pull this off.

The “next generation” missile defense shield would protect the U.S. from ballistic, hypersonic, advanced cruise missiles and other advanced aerial attacks, according to a fact sheet seen by CNN. Though no weapons of this sort have been used against the U.