Trump’s »Golden Dome« Riles Nuclear-Armed Foes

China, Russia and North Korea—harboring weapons that could reach U.S.—assail missile-shield plan as a blow to global stability.

President Trump upended years of geopolitics and domestic defense strategy when he announced he wanted to build a $175 billion missile defense shield that he’s calling the ‘Golden Dome.’ WSJ’s Shelby Holliday breaks down what it might look like, and why Trump wants it. Kevin Lamarque/Reuters/Ritzau Scanpix

President Trump’s “Golden Dome” plan has riled the three countries whose weapons technology poses the greatest threat to American territory, with China, Russia and North Korea claiming the missile-defense project is driving a dangerous new arms race.

Trump wants a Golden Dome shield in place by the end of his term, which would combine ground-based interceptors with satellites to guard U.S. territory against high-tech threats, including hypersonic missiles.