USAF and Northrop Accelerate Sentinel ICBM Silo Prototyping with Promontory Test
Northrop Grumman and the U.S. Air Force have accelerated prototyping of the LGM-35 Sentinel ICBM launch‑silo tube, conducting a proof‑of‑concept test in Promontory, Utah, and breaking ground on a prototype silo. The program is targeting initial operational capability in the early 2030s.