Valley Forge, Pa., November 4, 2026 – Lockheed Martin [NYSE: LMT] and the U.S. Air Force completed a test flight of its unarmed, developmental Mk21A reentry vehicle, launched over the Pacific Ocean from Vandenberg Space Force Base in California. ... To accelerate development, Lockheed Martin leveraged data from previous tests as well as digital engineering frameworks. These advanced tactics utilize high-fidelity modeling and simulation tools to compress program schedules, drive efficiencies, mitigate technical risks and ensure overall system performance. Data harvested from the most recent flight test will directly inform ongoing design refinements and shape future testing as the program maintains steady momentum toward system-level Critical Design Review (CDR). https://news.lockheedmartin.com/Lockheed-Martin-Completes-Flight-Test-of-Future-Intercontinental-Ballistic-Missile-System-Reentry-Vehicle