Lockheed Martin
- Lockheed Martin's SR-72 hypersonic aircraft failed to reach the skies amid Air Force budget cuts.
- The SR-72, a successor to the SR-71 Blackbird, has accrued about $335 million in losses since 2022.
- But emerging evidence suggests that the spy plane could still be under development in secret.
Lockheed Martin's mysterious hypersonic aircraft
