The U.S. Congressional Budget Office (CBO) has released its official assessment of the potential costs and operational limitations of the national missile defense system that the Washington administration plans to deploy against global missile threats.The report, which examines the technical architecture and financial burden of the project commonly known as the “Golden Dome,” provides detailed data on the system’s total cost and technical capabilities.
According to the report, titled “Costs of a National Missile Defense System Organized as a Layered Defense,” developing, deploying, and operating such a system—aligned with the capabilities outlined in the executive order—would cost approximately 1.2 trillion over 20 years. This budget estimate reveals a financial burden far exceeding the 185 billion projection previously stated by relevant defense offices for a ten-year timeframe.
Layered Air Defence Architecture and Space Component
The CBO analysis breaks down the proposed national missile defense system into four distinct intercept layers. The system would consist of a space-based layer, two wide-area surface layers, and a surface-based regional sector layer. The most expensive component of the architecture, designed to counter all airborne threats including intercontinental ballistic missiles (ICBMs), hypersonic missiles, and cruise missiles, would be the space segment.
Calculated to account for roughly 70% of the procurement budget and 60% of the total cost, the space-based intercept layer would comprise a massive constellation of 7,800 satellites. This satellite network is expected to have the capacity to intercept up to 10 nearly simultaneous ICBM salvos. For the surface layers, the plan includes two new Ground-Based Midcourse Defense (GMD) systems in addition to the existing facility at Fort Greely, four Aegis Ashore sites across the continent, and 35 independently operating regional sector radars.
Operational Limitations and Risk of Being Overwhelmed
The published report also makes striking acknowledgments about the military and technical limitations of this enormous architecture. According to the analysis, the system would be fully capable of countering a missile attack from a regional adversary with limited capabilities, such as North Korea. However, it emphasizes that the system could be insufficient and potentially overwhelmed in the face of a full-scale, dense missile barrage from a near-peer power like Russia or China.
The report clarifies that the term “fully counter” does not militarily equate to “completely defeat,” underscoring that no air defense system can ever be flawless. The significant discrepancy between the Pentagon’s previous budget estimates and the CBO’s cost analysis is attributed to differences in timeframes, scope of operations, and methodological changes in budget categories.
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Source: C4Defence
