The United States has conducted the first live-fire test of the Golden Dome missile defence architecture, with Defence Secretary Pete Hegseth observing as directed-energy weapons intercepted multiple drones and cruise missiles at the White Sands range in New Mexico. Hegseth declared the test a “complete success” and a “historic milestone”, crediting funding from what he termed the “Big Beautiful Bill”. The demonstration employed a Dynamic Autonomous Defence and Defeat system that, according to the Pentagon, autonomously tracked and neutralised every incoming threat. It marks the first time a sitting US defence secretary has personally witnessed such a test, and Hegseth framed it as the realisation of President Ronald Reagan’s Strategic Defence Initiative, now being executed under President Donald Trump’s January 2025 executive order.

Viewed from Washington, the test validates a core technological layer of a shield intended to protect the entire US homeland from ballistic, hypersonic and cruise missiles. The architecture, developed under the Space Force and the newly renamed “Department of War”, envisions ground-, sea- and space-based interceptors. Yet the programme’s cost remains sharply contested: the Congressional Budget Office projects $1.2 trillion over twenty years, while the Trump administration has cited a figure of roughly $175 billion. The test also unfolded against a backdrop of leadership turbulence at the Pentagon, where Hegseth faces congressional scrutiny over budget proposals, staff turnover and allegations of ethical misconduct, factors that analysts in Washington say could influence legislative oversight of the programme’s future funding.

Moscow and Beijing have responded with a joint démarche. In a May 2025 statement, the two capitals called Golden Dome “deeply destabilising”, arguing that it strengthens arsenals for combat operations in space and transforms that domain into an arena of armed confrontation. Russian Foreign Minister Sergei Lavrov separately warned that the planned deployment of space-based interceptors by 2028 would sharply increase the risks of space militarisation. Pyongyang has also condemned the project, asserting that it is designed for offensive purposes and threatens the security of states hostile to the United States. Russia’s ambassador to Washington, Alexander Darchiev, has indicated that the programme is delaying the resumption of bilateral dialogue on strategic stability.

Golden Dome was originally labelled “Iron Dome for America” but was renamed in February 2025 to avoid confusion with Israel’s short-range system, which defends populated areas against rockets and mortars. The American concept, by contrast, aims to counter intercontinental-range threats through a multi-layered, space-enabled network. The successful test of directed-energy weapons—including high-energy lasers and microwave systems from Lockheed Martin, nLight and AeroVironment—demonstrates progress in countering mass drone and cruise-missile salvos, but the more ambitious space-based interceptor layer remains years from deployment. The administration has requested over $2 billion for directed-energy research in fiscal year 2027, and further integration tests are expected as the Space Force moves to finalise the system’s architecture.