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https://www.twz.com/40003/the-worlds-most-secretive-737-just-showed-its-bizarre-self-over-the-mojave-desert
The World's Most Secretive 737 Just Showed Its Bizarre Self Over The Mojave Desert
Apr 1, 2021 - America's notoriously shy and increasingly geriatric flying signature measurement testbed aircraft has surfaced once again.
secretive 737mojave desertworldshowedbizarre
https://www.twz.com/the-worlds-most-secretive-737-just-migrated-to-oklahoma
The World's Most Secretive 737 Just Migrated To Oklahoma
Jun 2, 2022 - The shyest and most heavily modified 737 on the planet just left its usual test airspace confines and flew to Oklahoma.
secretive 737worldmigratedoklahoma
https://www.twz.com/air/worlds-most-secretive-737-rat55-just-made-a-rare-public-appearance
World’s Most Secretive 737 Just Made A Very Rare Appearance
May 22, 2025 - The highly modified NT-43A bounces around between secretive test bases and is used to collect radar data on stealthy aircraft in-flight.
secretive 737rare appearancemade
https://www.twz.com/air/shadowy-rat55-radar-test-bed-737-has-begun-the-next-phase-of-its-career
Secretive 737 Radar Jet 'RAT55' Has Begun “The Next Phase Of Its Career”
Apr 1, 2026 - Making a peculiar appearance supporting NASA's Artemis II launch is just the beginning of what comes next for the world's most secretive 737.
secretive 737radar jetnext phasebegun
https://www.twz.com/space/worlds-most-secretive-737-is-supporting-nasas-historic-artemis-ii-launch
World’s Most Secretive 737 Is Supporting NASA's Historic Artemis II Launch
Apr 1, 2026 - It is rare to see the unique NT-43A aircraft at all, let alone flying over Florida ahead of the first crewed lunar space mission in decades.
historic artemis iisecretive 737supportingnasalaunch