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March 2021 announcement, March 2022 delivery
InflightMarch2021 InflightMarch22arrivals
Announced March 8 2021, February 2024 delivery
The YF-12 was an experimental fighter-interceptor version of the Lockheed A-12 reconnaissance aircraft. YF-12s were used in a joint Air Force-NASA research program to study the thermal, structural, and aerodynamic effects of sustained, high-altitude fligh