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Air Force

As USAF Considers When to Hold First Sentinel Flight Test, Lockheed Martin Receives Add-On for Mk21A

Frank Wolfe

Tuesday, November 25th, 2025

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As USAF Considers When to Hold First Sentinel Flight Test, Lockheed Martin Receives Add-On for Mk21A

Pictured is a U.S. Air Force photo of a Minotaur I rocket with an unarmed Mk21A reentry vehicle on the launch stand at Vandenberg Space Force Base, Calif. on June 16, 2024.

As the U.S. Air Force considers when it will have a first flight test in the development of the LGM-35A Sentinel ICBM by Northrop Grumman [NOC], Lockheed Martin [LMT] has received a nearly $454 million contract add-on from the Air Force Nuclear Weapon Center at Hill AFB, Utah, for Sentinel's Mk21A re-entry vehicle. The contract add-on, awarded this month, brings Lockheed Martin's total award under Mk21A to nearly $1.5 billion. The company is to do the contract work through September…

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