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Story summary
- The Federal Aviation Administration has proposed revising the 53-year-old supersonic flight ban to be based on noise rather than speed.
- Regulators are shifting the ban from a speed restriction to a noise-based limit.
- The original rule barred aircraft such as the Concorde, limiting their economic viability on transcontinental routes.
- Advances in aircraft design now make quieter supersonic jets a realistic near-future possibility.
