Event Brief
Sentinel ICBM completes vertical stacking ahead of 2027
By The BriefBrief · Sources (2)
Filed: Sep 22, 2026 at 3:04 PM ET
Summary: The Air Force Sentinel intercontinental ballistic missile program completed vertical stacking of the inert missile at Vandenberg Space Force Base, verifying that missile stages, propulsion elements, shroud and subcomponents can be assembled into a single configuration test pad. A first flight test design review was also completed, supporting 2027 initial flight testing.
WHO: Air Force Sentinel program; Maj. Gen. William S. Rogers
WHAT: Completed vertical stacking of the inert Sentinel ICBM and finished a first flight test design review.
WHEN: 2026
WHERE: Vandenberg Space Force Base, California, USA
WHY: To validate technical baselines and readiness for the next phase of development and 2027 initial flight testing.
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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