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Minuteman III

GS3 – S&T

Context

The U.S. Air Force successfully test-launched its LGM-30G Minuteman III ICBM (Intercontinental Ballistic Missile), designed for long-range nuclear strike capabilities.

Minuteman III ICBM Overview:
  • Originally deployed in the 1970s, the Minuteman III is set to be phased out and replaced by the LGM-35A Sentinel system.
  • It serves as a reliable deterrent until the new system is fully operational.
  • “LGM” refers to a silo-launched (L), ground-targeted (G), guided missile (M).
  • Initially produced by Douglas Aircraft, later managed by McDonnell Douglas, and now maintained by Boeing.
Key Features:
  • Operational Since: 1970s; it was the first U.S. missile to carry MIRVs (Multiple Independently targetable Reentry Vehicles), allowing one missile to hit multiple targets.
  • Though designed for a 10-year lifespan, it has been extensively upgraded and will remain active until replaced in 2029.
  • Specifications:
    • Height: 18.2 m
    • Diameter: 1.85 m
    • Launch Weight: 34,000+ kg
    • Speed: Up to Mach 23 (approx. 15,000 mph)
    • Range: Around 13,000 km
  • Payload: Originally housed 3 MIRV warheads, now limited to one under disarmament agreements.
  • Deployment: Stored in reinforced underground silos operated by two-person crews with robust control systems.
  • Propulsion: Three-stage solid-fuel engine.
  • Redundancy: Airborne control teams provide a backup launch capability to ensure second-strike potential during conflict.
  • Role in Nuclear Triad: It represents the land-based leg of the U.S. nuclear triad (alongside air and sea systems), ensuring credible deterrence.
  • Reliability: Known for its nearly perfect test success rate, reinforcing its strategic value.
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