What’s the Latest on Golden Dome?

It has been a while since we checked in on how the “Golden Dome for America” (GDA), is going. Since President Donald Trump first announced in January 2025 that there would be a missile defense shield for the US, the GDA has been moving steadily, with the expected fits and starts, but generally in the right direction. But the program still needs to make significant progress to meet President Trump’s milestone of achieving operational capability by the end of his term.

High Hopes for the Golden Dome

The hope for the Golden Dome is that the air defense umbrella can detect, identify, track, and destroy a variety of airborne weapons attacking the US lower 48 states, Alaska, and Hawaii. Attacking weapons would include “ballistic, hypersonic, advanced cruise missiles, and other next-generation aerial attacks from peer, near-peer, and rogue adversaries,” according to President Trump’s January 27, 2025, Executive Order 14186. The initial cost of the system has been put at $175 billion, later revised to $185 billion over ten years. According to the latest Congressional Budget Office (CBO) estimates, the entire system will cost $1.2 trillion over 20 years.

Though the specifics of GDA have not been made public, the CBO based its cost estimate on the most likely scenario: “layered defense against ballistic missiles, hypersonic missiles, cruise missiles, and other aerial threats.” The layers would include a space-based interceptor (SBI) layer of satellites in low Earth orbit that would cover the continental US, Alaska, and Hawaii. Enemy weapons that get through the upper layer would be engaged by the existing field of Ground-Based Interceptors at Fort Greely, Alaska, and two new fields with next-generation interceptors yet to be made operational. Shorter-range missiles, drones, and cruise missiles would be met at the next level with Aegis Ashore systems consisting of Standard Missiles “similar to those the US maintains in Romania and Poland,” the CBO explained. The final layer would provide for regional sector defense. According to the CBO analysis, sectors would encompass 104,248 square miles and be covered likely by shorter-range point defense missiles.

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The most expensive of the layered defense is the SBI at $743 billion over 20 years. CBO cost figures provide for a layered defense consisting of a constellation of 7,800 space-based interceptor satellites designed to engage ten nearly simultaneously launched intercontinental ballistic missiles (ICBMs) during their initial boost phase. Long-range hypersonic glide vehicles could also be destroyed if the rocket engine burns long enough. Developing and fielding the space-based systems represent the most challenging technology requirements.

An August 2026 Space and Missile Defense Symposium in Huntsville, Alabama, featured Space Force General Michael Guetlein, the GDA program manager, who provided the latest updates on the program. According to Aerospace America, “The Pentagon official overseeing the Trump administration’s planned multilayered missile defense shield said today the initiative has its ‘first operational site’ at Fort Story, Virginia. ‘We are digging dirt around the homeland,’ Gen. Michael Guetlein, Golden Dome’s program manager, said at the Space and Missile Defense Symposium here.”

In his keynote speech at the symposium, Guetlein told the Symposium audience: “We’ve had two tests. We can’t talk about those tests, but those tests were phenomenally successful, and they demonstrated that the capabilities that we are putting together — both command and control, our sensor network and our effectors — are going to be effective against the threats as they are currently designed,” The Washington Times reported. Guetlein commented on the rigor of the testing, explaining the test was “the most complex test, with the most threats in the air’ in the history of the testing range,” The Times said.

Program Faces Challenges

Though the program appears to be on track, it is not without its challenges. Dependable, sufficient funding is a major potential stumbling block. Breaking Defense observed: “Work on the Golden Dome national air defense shield could come to a grinding halt in October if lawmakers do not figure out a way to continue funding for the presidential initiative, the general in charge of the massive project warned today.” Congress must avoid another continuing resolution before the end of the fiscal year on September 30 and provide the funding the program requests. Fits and starts in the program drive costs up. 

Technology maturity is another hurdle the GDA program is encountering. Relying on mature commercial technology is one way to meet the need for existing technology. Despite the potential stumbling blocks the program faces, General Guetlein told a House Armed Services Strategic Forces Subcommittee on April 15, “We’re going to deliver an operational capability by the summer of [2028] that will be able to protect the homeland against a variety of threats,” the Washington Examiner reported. Many potential speed bumps stand in the way of the program. As it stands, General Guetlein believes they are not insurmountable. But it’s all up to Congress.

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The views expressed are those of the author and not of any other affiliate.