# Sentinel ICBM, 81% over budget, still being restructured
> America's $141B Minuteman replacement targets a first test launch in 2027, years late, with new-build silos driving the overrun

**Meta:** type: event · date: 2026-06-10 · heads: 誰の金か, 長期戦 · 8 takes · 3 lenses · 3 regions

## Summary

The [LGM-35A Sentinel](/ja/entity/sentinel-icbm), the [US Air Force's](/ja/entity/air-force) replacement for the
Minuteman III ICBM force, remains under restructuring nearly two years after a critical
[Nunn-McCurdy](/ja/head/whose-money) cost breach. The Pentagon recertified the program but total cost
rose 81% to ~$140.9B; the overrun is concentrated not in the missile but in the decision to
build new silos and command infrastructure rather than reuse 50-year-old Minuteman launch
facilities judged too decrepit. [Northrop Grumman](/ja/entity/northrop-grumman) is checking off
milestones as the Air Force aims to finish restructuring by end-2026, fly a first test launch
by 2027 and reach initial capability in the [early 2030s](/ja/head/the-long-game). The FY26 budget
sought $3.7B; Congress added $2.5B in reconciliation for risk reduction. The land leg's delay
lands as the [arms-control regime](/ja/n/new-start-expiry-aftermath) lapses.

## By the numbers

- +81%, cost growth, to ~$140.9B total.
- $3.7B + $2.5B, FY26 request plus reconciliation add for risk reduction.
- 2027, targeted first test launch.
- early 2030s, projected initial operational capability.
- ~2 years, since the cost breach, still being restructured.

## Why it matters

Sentinel modernizes one full leg of the US nuclear triad, and its slippage means the aging
Minuteman force must serve years longer than planned, just as China and Russia expand. Cost
growth this large also squeezes the rest of the [defence budget](/ja/head/whose-money), including the
interceptor rebuild.

## What to watch

- Whether the restructure actually closes by end-2026.
- The 2027 first test launch as a credibility marker.
- How long Minuteman III must be life-extended to cover the gap.

## Regional takes (batched by bias / lens)

### unlabelled
- **US Department of War, Sentinel Nunn-McCurdy review release** (United States, en) — The Pentagon's own announcement of the Sentinel Nunn-McCurdy review results: certifies the program continues despite the critical cost breach, restructures it, and sets the path to recertification, the primary record of the decision.
  Source: https://www.war.gov/News/Releases/Release/Article/3829985/department-of-defense-announces-results-of-sentinel-nunn-mccurdy-review/
- **US GAO, ICBM modernization snapshot** (United States, en) — GAO's national-security snapshot on ICBM modernization: lays out Sentinel's critical risks and schedule, the launch-infrastructure cost driver, and oversight findings, the independent watchdog record.
  Source: https://www.gao.gov/products/gao-26-108755
- **AeroTime** (Lithuania, en) — 
  Source: https://www.aerotime.aero/articles/us-dod-sentinel-icbm-program-cost-overruns
- **Air & Space Forces (work-halt order)** (United States, en) — 
  Source: https://www.airandspaceforces.com/air-force-orders-halt-some-work-sentinel-icbm/
- **Congressional Research Service (Sentinel primer)** (United States, en) — 
  Source: https://www.congress.gov/crs-product/IF11681
- **Wikipedia (LGM-35 Sentinel)** (Global, en) — 
  Source: https://en.wikipedia.org/wiki/LGM-35_Sentinel

### air-power trade
- **Air & Space Forces Magazine** (United States, en) — Reports Northrop checking off restructure milestones, the Air Force aiming to finish restructuring by end-2026, first test launch by 2027 and IOC in the early 2030s, with the bulk of the overrun in newly-built silo and command infrastructure.
  > "The Air Force aims to finish restructuring Sentinel by end-2026, achieve a first test launch by 2027 and reach initial operational capability in the early 2030s."
  Source: https://www.airandspaceforces.com/northrop-sentinel-milestones-program-restructure/

### defence analysis
- **The War Zone (TWZ)** (United States, en) — Stresses that nearly two years after the cost breach the program is still being restructured and remains years behind, with the decision to build new silos rather than reuse 50-year-old Minuteman infrastructure driving the blowout.
  > "Nearly two years after the breach, Sentinel is still being restructured, the choice to build new silos rather than reuse Minuteman's drove the overrun."
  Source: https://www.twz.com/nuclear/troubled-sentinel-icbm-program-still-being-restructured-nearly-two-years-after-cost-breach

## Across the graph
- Related: [[b21-raider-combat-testing-2026]], [[new-start-expiry-aftermath]]
- Entities: Sentinel Icbm, United States, Northrop Grumman, Air Force, Nuclear Weapons

---
Canonical: https://rbtfl.xyz/ja/n/sentinel-icbm-restructure-2026