Mother Jones illustration; Paul Sancya/AP; Getty

Donald Trump’s Republican Party platform, released in July, contains little in terms of tangible policy proposals.

But one of the few concrete ideas is a call to (apologies for the capitalization) “PREVENT WORLD WORLD III” by building “A GREAT IRON DOME MISSILE DEFENSE SHIELD OVER OUR ENTIRE COUNTRY”—a plan that experts say is nearly impossible to execute, unnecessary, and hard to even comprehend.

Trump has vowed to build this Iron Dome in multiple speeches. It is among his campaign’s 20 core promises. The former president has said that the missile shield would be “MADE IN AMERICA,” creating jobs, as well as stopping foreign attacks.

An expert called Trump’s Iron Dome idea “the insane ramblings of a senile old person.”

While it might sound nice to talk of building the........

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