The ground-based leg of the strategic nuclear triad.

About Sentinel

The U.S. Air Force’s LGM-35A Sentinel weapon system is a critical modernization of the ground-leg of the U.S. nuclear triad, the bedrock of U.S. national security. Sentinel supports global stability by serving as a safe, secure and credible deterrent to protect our nation and assure allies for decades to come.

missile launch test

Sentinel Newsroom

Advancing Sentinel with Key Tests

Northrop Grumman completed tests of several elements of the Sentinel intercontinental ballistic missile, marking significant progress for the program in its engineering, manufacturing and development phase.

Read the Press Release
Defense weapon system with plumes of smoke in air.

Sentinel News

Read about the latest innovations and developments around Sentinel. 

Rosibel Diaz wears a white coat, gloves and hairnet and stands at a table in a blue-lit lab, examining a mirrored panel in her hands.

Feature Stories

Read about the personal journeys, dedication to mission, and experiences of Sentinel team members. 

Industrial image of mechanical equipment

Photos and Videos

Images and media available to download. 

Sentinel Careers

We invest in people, facilities, and tools needed to deliver the Sentinel solution.