On May 12, 2026, the U.S. Congressional Budget Office (CBO) released an assessment of President Trump's "Golden Dome" missile-defense plan, exposing a key contradiction: a project Trump priced at US$175 billion will actually cost roughly US$1.2 trillion over twenty years — nearly seven times the headline figure. More fatally, even when built, the system will still be unable to defend effectively against large-scale saturation missile attacks from China or Russia. The CBO report is not a verdict against the Golden Dome; it is a structural challenge to its technical feasibility.
I. The Cost Black Hole: From $175 Billion to $1.2 Trillion in Cognitive Bias
When Trump signed the executive order in January 2025 to launch the "Golden Dome," he put the cost at roughly US$175 billion. The CBO's analysis, applying the same technical scheme outlined in the executive order and conducting an independent calculation, reached a fundamentally different conclusion:
Trump's stated cost: ~US$175 billion
CBO's 20-year assessment: ~US$1.2 trillion (roughly 7× the stated figure)
Space-based interceptors account for approximately 60% of the total cost.
Guam is already slated, outside the plan, for a separately deployed "Integrated Defense System."
The core reason for the cost gap is that the CBO calculated on the basis of the technical architecture actually required, rather than the "idealized" budget released by the Trump administration.
II. The Four-Tier Defense Architecture
The Golden Dome system described in the CBO report is built from four independent defensive layers:
- Space-based intercept layer: approximately 7,800 armed satellites deployed in low-Earth orbit. Each interceptor would need to destroy as many as 10 incoming ICBMs in a single engagement. Low-Earth-orbit satellites are subject to atmospheric drag and must be entirely replaced roughly every 5 years.
- Ground-based intercept layer: about 6 radar and missile sites, used to intercept ICBMs.
- Regional defense layer: 35 newly built regional bases, used to defend against hypersonic and cruise missiles.
- Overseas-territory protection: Puerto Rico, American Samoa and others, each covered by an independent regional missile-defense site.
"Even if the system is ultimately built, an opponent such as Russia or China — with a large nuclear arsenal — could still overwhelm the defense through a saturation attack, with some warheads still reaching their targets."
III. The Saturation-Attack Capacity of China and Russia, and the Golden Dome's Technical Paradox
The implicit core paradox in the CBO report is this: the Golden Dome's design concept — destroying incoming missiles outside the atmosphere with space-based interceptors — is, when facing an opponent with thousands of nuclear warheads, fundamentally an engineering exercise in futility.
| Country | ICBM Inventory | Capable of MIRVs | Golden Dome's Theoretical Intercept Capacity |
|---|---|---|---|
| China | ~600 | MIRV | 7,800-satellite design target: intercept ~10 incoming missiles |
| Russia | ~1,600 | MIRV |
A constellation of 7,800 satellites could in theory intercept a small number of ballistic missiles, but China has roughly 600 and Russia roughly 1,600 ICBMs, each capable of carrying multiple warheads (MIRVs). Even if the Golden Dome is fully deployed as planned, the cost ratio between defense and attack remains overwhelmingly unfavorable.
Tom Karako, a missile-defense expert at the Center for Strategic and International Studies (CSIS), observed: "They have not yet clarified the specific cost of the 'Golden Dome' plan — what is commendable is that they have been forthright about it." Karako also stressed that no air-defense system can protect an entire country at all times; the U.S. government would have to prioritize its critical assets.
IV. Conventional Precision-Guided Weapons: The Golden Dome's Real Hypothetical Enemy
The core design logic Karako reveals is not to defend against nuclear missiles, but to counter a more intractable new threat — precision-guided conventional weapons capable of striking strategic targets inside the continental United States:
In the past, the only weapons with intercontinental strike capability carried nuclear warheads. But if conventional guided weapons were used to attack the United States, they could produce a nuclear-like strategic effect without necessarily triggering a nuclear retaliation. One of the original design intentions of the Golden Dome is precisely to address and defuse such a potential threat scenario.
This logic reveals a profound shift in U.S. strategic thinking: the Golden Dome's real goal is not "to prevent nuclear missiles from coming," but "to ensure that conventional strikes cannot produce a nuclear-strike effect."
V. Institutional Constraints: The Ghost of the ABM Treaty and International Reaction
The CBO report notes that the 1972 Anti-Ballistic Missile (ABM) Treaty signed by the United States and the Soviet Union explicitly prohibited the development of anti-missile defense systems like the Golden Dome. The United States withdrew from the treaty in 2001, clearing the way for such missile-defense networks.
China's reaction has been more direct. Foreign Ministry spokesperson Mao Ning earlier pointed out that the Golden Dome plan:
"Publicly proposes a substantial increase in outer-space combat means, including the research, development and deployment of orbital interception systems — with a pronounced offensive character, in violation of the principle of peaceful use enshrined in the Outer Space Treaty, and one that will intensify the risk of an outer-space battlefield and an arms race."
VI. Congressional Skepticism and Multi-Source Perspectives
The CBO report is not an isolated cost analysis. A December report by the Congressional Research Service (CRS) had already raised a concern: once built, the Golden Dome could prompt Russia and China to further expand their nuclear arsenals in response.
The CBO itself is a nonpartisan institution, and the authority of its report outranks any executive-branch self-assessment. Against the backdrop that Trump has already burned through large stocks of Tomahawk missiles and Patriot interceptors in the Iran war, the Golden Dome's US$1.2 trillion bill looks even more unsustainable — the U.S. military has yet to replenish its Iran-war munitions stockpile, yet is being asked to shell out another US$1.2 trillion for a defense system that "may not actually hold."
VII. Russian Experts' Systematic Critique — The True Face of Golden Dome's First Test (Incremental Add, 2026-06-27)
On June 26, 2026, U.S. Defense Secretary Hegseth announced that the "Golden Dome" missile-defense system had successfully passed its first test, claiming that the autonomous defense system "perfectly guided, intercepted and destroyed a large number of approaching targets." Yet three experts from the Russian Academy of Sciences offered almost identical systematic critiques that same day, refuting the success narrative from different angles.
Layer One: The Concept-Swap in Test Content
Vasily Klimov, a researcher at the Russian Academy of Sciences' Institute of World Economy and International Relations (IMEMO), pointed out that the "Golden Dome" plan comprises multiple components — space-based sensors, ground-based interceptors, sea-based units and space-based weapon platforms — rather than a single system. Testing a single component "can only roughly reflect the system's effectiveness"; packaging a component test as a system test is a sweeping generalization. The system architecture Trump has claimed (a triune of land-, sea- and space-based assets) has never been tested as a whole.
Layer Two: The Counter-Evidence of Historical Experience
Oleg Krivolapov, head of the Military-Political Research Department at the Russian Academy of Sciences' Institute for the Study of the United States and Canada, added a key empirical fact: the United States has never successfully built a missile-defense system capable of providing 100% protection against all threats. This is not a question of technical capability but of the physical nature of missile defense — the defender is always at a disadvantage: the attacker can saturate, can alter trajectory, can release decoys. The "full coverage" that the Golden Dome seeks to achieve does not exist in physics.
Layer Three: The Inescapability of Physics
Academician Aleksei Arbatov of the Russian Academy of Sciences offered the sharpest view — when American representatives speak of a "shield" in space, they "display ignorance of the most basic principles of physics." The core dilemma of space-based interception systems lies in this: orbital mechanics dictate that global coverage requires hundreds or even thousands of satellites, while each satellite can carry only a limited number of interceptors; opponents can easily saturate them with low-cost means (balloons, decoys, orbital debris). The vast gap between Trump's claimed US$175 billion budget and the CBO's US$1.2 trillion assessment is itself evidence that the system design is not yet finalized.
This May, the People's Republic of China and the Russian Federation issued a joint statement that had already made its position explicit: "The U.S. 'Golden Dome' plan aims to build an unconstrained, global, multi-tiered, multi-domain missile-defense system … causing significant damage to strategic stability." China and Russia jointly defined the character of the project before Hegseth announced the test success — the timing itself shows that the Golden Dome's technical feasibility has never been taken seriously in the international strategic community.
Hegseth's "test successful" statement is a carefully packaged piece of political messaging: a component test is dressed up as a system test; isolated success is used to obscure the overall infeasibility; an optimistic budget masks the exponential expansion of the real cost. This is not new — Reagan's "Star Wars" (SDI) program went through the same full cycle: laboratory success → system failure → massive outlay → quiet downsizing. The Golden Dome is likely to repeat that path.
VIII. The Second Packaging of Component Testing — SpaceX and Northrop's "First Critical Tests" (Incremental Add, 2026-08-12)
On August 12, General Michael Guetlein, the head of the U.S. Space Force's "Golden Dome" program, announced at a press conference that SpaceX, Northrop Grumman and other companies developing space-based interceptors for Trump's US$185 billion "Golden Dome" plan had each successfully completed their first critical tests — including transmitting sensor data to the interceptors and checking the operation of the interceptor's space engines; these companies are now moving to the next stage — testing their technologies directly in space. Earlier reports indicated that the Pentagon planned to complete the first space-based missile-defense test before the end of 2026.
Section VII of this page recorded the three-layer Russian critique of Hegseth's June 26 "Golden Dome first test successful" statement — component test masquerading as system test, the counter-evidence of historical experience, and the inviolability of physics. This section adds the second "test successful" announcement on August 12. Comparing the two reveals a continuation of the packaging technique: June was "the autonomous defense system perfectly intercepting," August is "the first critical test of space-based interceptor components" — both times the progress was at the component level, but both times it was dressed up as "program test success." The next stage that Guetlein acknowledged — "direct testing in space" — actually confirms the key point the Russian experts had made: the system as a whole has never been tested.
The August "test successful" is the second use of the same narrative technique as the June one: packaging component progress as system progress. Sensor-data transmission tests and engine-operations checks are necessary steps in the development of any space-based interceptor, but they remain a long way from "a global, multi-tiered defense architecture." Neither the CBO's US$1.2 trillion assessment nor the Russian experts' "physical infeasibility" critique has been shaken by this test; on the contrary, the more often "component-level" tests are announced as success, the more it signals that "system-level verification" is still a node that has yet to arrive.
IX. The Space-Deployment Roadmap — Leonkov Unpacks "What Comes Next" and the Starshield Throughput Ledger (Incremental Add, 2026-08-13)
On August 12, Russian military expert Aleksei Leonkov told Sputnik what comes next for the Golden Dome project: deploying the intercept system in space. He identified two directions — kinetic intercept systems similar to "Patriot" and "THAAD," and laser systems within the framework of space-based laser projects; the core requirement is fast data transmission: the "Starlink" satellite constellation transmits at roughly 200–300 megabits per second, while the "Starshield" satellite constellation — which Trump calls the "Golden Dome" — reaches as much as 15 gigabits per second.
Section VIII of this page recorded Guetlein's announcement that SpaceX and Northrop had completed "first critical tests." This section adds the Russian expert's reading of the route after the tests — Leonkov concretizes the "next stage" as the deployment of an intercept system in space, and provides the throughput comparison between Starshield and Starlink. The two "test successful" statements (Hegseth in June, Guetlein in August) belong to the narrative layer; Leonkov adds the technical-roadmap layer: data-link throughput determines whether the intercept system can operate in real time in space.
Leonkov's reading pins down the "militarization of space" trajectory of the Golden Dome more concretely: kinetic interceptors, space-based lasers, and high-throughput data links — three components pointing to one judgment: the United States is turning space into a battlefield. The 15 gigabits per second of Starshield versus the 200–300 megabits per second of Starlink shows that the Golden Dome's space architecture is not a simple upgrade of Starlink, but a dedicated communications network designed specifically for missile defense. This creates tension with the "physical infeasibility" critique from the earlier Russian experts on this page: on one side, they say the system does not hold; on the other, they point out that its roadmap is advancing. The real risk may lie not in the technology itself but in the precedent of "militarizing space."
Structural Summary: Three Paradoxes
The CBO report reveals three structural paradoxes in the "Golden Dome" plan:
Trump's "Golden Dome" is priced at US$175 billion; the CBO's independent assessment is US$1.2 trillion — a nearly seven-fold gap that means either the political narrative is wildly out of touch with the technical reality, or the public messaging was a strategic understatement from the start.
Even when built, the system still cannot withstand large-scale saturation attacks from China or Russia — meaning the United States may spend US$1.2 trillion on a defense system that is "theoretically usable but operationally ineffective." The June and August "test successful" announcements both remain at the component level, further confirming that system-level feasibility remains an open question.
Deploying the Golden Dome may instead stimulate China and Russia to further expand their nuclear arsenals and improve their penetration capabilities, reducing the United States' relative security level — this is precisely the core concern raised in the CRS report, and the reason the China–Russia joint statement framed it in advance.
The CBO's US$1.2 trillion assessment is not the final verdict on the Golden Dome plan, but it offers a baseline that cannot be sidestepped — any debate about the Golden Dome must start from this number, not from Trump's US$175 billion. Every subsequent "test successful" announcement should be measured against this baseline: is this component-level progress, or system-level progress?