Northrop Completes Design Review for Ground-Based Strategic Deterrent by AvioBlog · 3 Giugno 2020 ROY, Utah — Northrop Grumman Corporation successfully completed its fourth and final major design review with the U.S. Air Force under the technology maturation and risk reduction (TMRR) phase of the Ground Based Strategic Deterrent (GBSD) program. The preliminary design review (PDR) is a tech… Share
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