{
  "id": "w87-1",
  "name": "W87-1",
  "aliases": [],
  "domain": "nuclear",
  "country": "USA",
  "category": "Nuclear warhead",
  "status": "in-development",
  "fielded": null,
  "operators": [
    "USA"
  ],
  "summary": "New ICBM warhead for the LGM-35A Sentinel on the Mk21A reentry vehicle.",
  "specs": [
    {
      "k": "delivery",
      "v": "LGM-35A Sentinel ICBM (Mk21A reentry vehicle)",
      "src": [
        "fas-nn-us-2026"
      ],
      "conf": "medium"
    },
    {
      "k": "program",
      "v": "Deployment expected early 2030s; first W87-1 pit produced at Los Alamos in October 2024; cost up to $14.8 billion excluding pits",
      "src": [
        "fas-nn-us-2026"
      ],
      "conf": "medium"
    }
  ],
  "payloads": [],
  "variants": [],
  "art": "nuclear",
  "image": null,
  "verified": null,
  "changelog": [
    {
      "date": "2026-11-08",
      "change": "Entry created from United States nuclear weapons, 2026 (FAS Nuclear Notebook)"
    }
  ],
  "url": "https://www.defensepedia.com/systems/w87-1.html",
  "sources": {
    "fas-nn-us-2026": {
      "title": "United States nuclear weapons, 2026",
      "publisher": "Federation of American Scientists Nuclear Notebook, Bulletin of the Atomic Scientists",
      "url": "https://thebulletin.org/premium/2026-03/united-states-nuclear-weapons-2026/",
      "published": "2026-03-01",
      "tier": 2,
      "checked": "2026-11-08"
    }
  }
}