NASA announced a new phase of testing for the experimental X-59 aircraft, designed for quiet supersonic flight. On October 21, 2026, the agency's test pilot Mike Lippert flew the aircraft for the first time. The flight launched from NASA's Armstrong Flight Research Center. The X-59 is an experimental aircraft developed to demonstrate the possibility of supersonic flight without the characteristic loud sonic boom that typically accompanies breaking the sound barrier. The aircraft made its first flight in November 2025, and on June 5, 2026, it first reached supersonic speed. Since then, the aircraft has repeatedly taken to the air as part of the testing program. The X-59 project is part of NASA's broader Quesst initiative, which aims to gather data on how people on the ground perceive the sound from this new type of supersonic flight. If the technology proves successful, it could help lift the current restrictions on supersonic flights over populated areas, potentially opening the door to a new generation of passenger supersonic aircraft. The participation of a new pilot in the testing represents an important step in expanding the testing program, allowing the collection of additional data on the aircraft's characteristics and handling in the hands of different test pilots.