WASHINGTON — President Donald Trump signed an executive order Jan. 27 that calls for the development of a sweeping new missile defense system for the United States, including controversial space-based interceptors.
The “Iron Dome for America” order, which invokes Israel’s successful rocket defense system, directs the Pentagon to accelerate development of defenses against hypersonic weapons and other advanced aerial threats that Trump’s order describes as “the most catastrophic threat facing the United States.”
While drawing inspiration from Israel’s Iron Dome system, the U.S. initiative would need to be dramatically different in scale and capability to defend the continent-spanning American territory against sophisticated intercontinental ballistic missiles, rather than the short-range rockets that threaten Israel.
The U.S. has collaborated with Israel on missile defense technology since the 1980s, including support for the Iron Dome system, which has intercepted thousands of incoming rockets since its 2011 deployment. Unlike Israel’s system, which defends a territory roughly the size of New Jersey, a U.S. continental defense system would need to protect an area nearly 500 times larger against more sophisticated threats such as Chinese hypersonic glide vehicles.
Unlike traditional ground- or sea-based systems, the envisioned architecture leans on space-based solutions, which have long been controversial.
The order’s most contentious element directs the Department of Defense to pursue space-based interceptors — weapons positioned in orbit to destroy incoming missiles. While proponents argue these could provide global coverage and early intercept capabilities, critics warn they could trigger an arms race and undermine existing treaties.
The Pentagon must submit within 60 days a proposed architecture for the system, including plans to accelerate the Missile Defense Agency’s ongoing Hypersonic and Ballistic Tracking Space Sensor program and develop a “custody layer” within the Proliferated Warfighter Space Architecture — a planned constellation of military satellites currently being acquired by the U.S. Space Force’s Space Development Agency.
The executive order also emphasizes securing the defense industrial base, requiring “next-generation security features” for the supply chain as the U.S. races to build advanced interceptors and tracking systems.
