Event Brief
Sentinel ICBM cost estimate rises to $140.9B
By The BriefBrief · Sources (1)
Filed: Sep 21, 2026 at 10:00 PM ET
Summary: The Air Force’s planned LGM-35A Sentinel ICBM is projected to cost $140.9 billion, 81% more than an original $77.7 billion estimate. The article says Sentinel cannot use existing Minuteman infrastructure and instead requires different dimensions, electrical architecture, and updated physical and cyber security across about 450 launch facilities in multiple states.
WHO: U.S. Air Force
WHAT: Cost estimate for the LGM-35A Sentinel ICBM increases to $140.9 billion, driven by design and security changes versus Minuteman infrastructure.
WHEN: Sep 21, 2026 at 9:02 PM ET
WHERE: USA
WHY: The missile replacement cannot be integrated into existing Minuteman infrastructure and needs different dimensions, electrical architecture, and updated physical and cyber security requirements across hundreds of launch facilities.
How this brief is built: The BriefBrief uses multi-source information fusion to correlate reporting across sources, identify related developments, and continuously update a structured WHO, WHAT, WHEN, WHERE and WHY event picture. Pattern arcs, source analysis, and velocity indicators provide deeper analysis in our MI Console.
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