Northrop Grumman tested the motor in the vacuum chamber in collaboration with the U.S. Air Force, continuing the development of the Minuteman III’s replacement.

Northrop Grumman has test fired the second-stage solid rocket motor of the LGM-35A Sentinel ICBM (Inter-Continental Ballistic Missile) in collaboration with the U.S. Air Force at Arnold AFB in Tennessee. The full-scale qualification test was conducted on Jul. 20, 2025, and announced on Jul. 29 by both the company and the Air Force Nuclear Weapons Center ( AFNWC ). Contents Northrop Grumman tested the motor in the vacuum chamber in collaboration with the U.S. Air Force, continuing the development of the Minuteman III’s replacement. Second-stage test Other tests Sentinel ICBM’s massive infrastructure

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