Donald Trump’s “Golden Dome” missile defense dream might seem like something out of science fiction, but it would cost real dollars, the Congressional Budget Office says—about $1.2 trillion over the next 20 years, according to a report the federal agency released today.

Trump has held the idea dear since his 2024 campaign, when he made “A GREAT IRON DOME MISSILE DEFENSE SHIELD OVER OUR ENTIRE COUNTRY” to “PREVENT WORLD WAR III” one of his 20 core campaign promises. Later, he rebranded it as the “Golden Dome,” and about a dozen major American weapons manufacturers (and over 2,300 smaller companies)........

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