President Donald Trump’s proposed “Golden Dome” missile defense system has sparked intense global debate. Announced in March 2025 and modeled after Israel’s Iron Dome, the $175 billion project aims to create a vast defense shield over the U.S. using land, sea, and space-based technologies. Trump claims the technology—once a dream during Reagan’s era—is now ready, and he intends to complete it by the end of his term in 2029.

The Golden Dome will include a network of 400–1,000 satellites for early detection and tracking, plus around 200 additional satellites potentially armed with interceptors. SpaceX, Palantir, and Anduril are among the firms expected to lead the satellite component, though weaponization may be handled separately. Trump insists all components will be built in the U.S., while costs for space elements alone could soar past $500 billion.

Foreign governments, especially China, are sounding the alarm. Beijing condemned the plan as destabilizing and a violation of the Outer Space Treaty, warning it could fuel a new global arms race. Chinese officials urged the U.S. to abandon the project and accused Washington of pursuing “absolute security” at the expense of international stability.

While support grows domestically—from defense contractors and lawmakers—the plan remains in its early stages. Congress has yet to approve funding, and the Pentagon is still shaping requirements. Critics worry the move will militarize space and trigger a strategic backlash, while Trump and supporters argue the system is essential to counter rising missile threats from nations like China, Russia, North Korea, and Iran.