The United States has unveiled plans for a next-generation missile defence architecture dubbed the “Golden Dome”, with President Donald Trump confirming the initiative just days after returning to the White House in January 2025. The system is described as a multi-layered national shield inspired by Israel’s Iron Dome but scaled to protect the entire US territory against evolving missile threats.

Speaking from the Oval Office, Trump said the Golden Dome would be operational before the end of his presidency. The initial funding of $25 billion has been approved under a new federal budget bill, with long-term projections estimating total costs may exceed $500 billion over two decades, especially for its space-based components.

Space-based interception and global coverage

The Golden Dome is designed to detect and intercept a wide array of aerial threats, including cruise and ballistic missiles, hypersonic glide vehicles, and fractional orbital bombardment systems (FOBS). Trump stated that the shield would employ land-based and sea-based platforms in addition to space-based sensors and interceptors, enabling interception of missiles “launched from the other side of the world, or from space.”

The programme is under the oversight of the United States Space Force, with General Michael Guetlein appointed to lead the effort. The White House and the Department of Defense have identified aerial attacks as “the most catastrophic threat” currently facing the American homeland, citing a recent Defense Intelligence Agency report that highlights how Russia and China are actively exploiting gaps in existing US defence networks.

Industrial mobilisation and Lockheed Martin’s role

Lockheed Martin is spearheading early conceptual and coordination efforts for the Golden Dome and has published an overview titled “Golden Dome for America.” According to the defence contractor, the system will feature a combat-proven architecture integrated with space-age innovations such as AI-enhanced trajectory prediction and real-time battle management software. The effort is likened to a modern-day “Manhattan Project”, aiming to unite established defence giants with commercial tech firms to deliver operational capability by late 2026.

Lockheed Martin’s statement emphasised that “this mission can’t be left to chance with unproven technology,” highlighting the importance of integrating existing missile defence systems into the initial design, while allowing for modular upgrades over time.

The company also underscored its leadership in command and control software (C2BMC), connecting allied missile defence nodes across the globe. The Golden Dome will follow an open-architecture approach, enabling the integration of both mature and emerging technologies as threats evolve.

Canada expresses interest in joining the system

President Trump revealed that Canada has expressed formal interest in joining the Golden Dome initiative. During a recent visit to Washington, then-Canadian Defence Minister Bill Blair described the project as aligned with Canada’s “national interest” and called it a logical extension of North American defence cooperation.

The statement suggests the US intends to use the Golden Dome as both a homeland shield and a regional defence anchor, possibly complementing or expanding NORAD’s mission with new technical layers.

Feasibility concerns and budgetary scepticism

Despite the ambitious vision, critics remain sceptical about the feasibility of deploying a fully integrated national missile shield. Experts point out the vast geography of the US and the technical complexity of intercepting high-speed threats in real time. Marion Messmer of Chatham House noted that the Israeli Iron Dome works within a confined operational area, making it a fundamentally different challenge from defending the entirety of the continental United States.

Moreover, the US Congressional Budget Office (CBO) has projected that space-based elements alone could cost upwards of $542 billion, significantly higher than current budget estimates. However, the Trump administration has framed the investment as essential to maintaining strategic deterrence in an era of renewed great power competition.

As development proceeds, the Golden Dome is expected to become a central pillar of the US missile defence strategy, marking a shift toward space-integrated deterrence against emerging threats. Whether the system can meet its tight timeline and scale without compromising technical viability remains an open question.

Author:  Özgür Ekşi