active·Information societyNASA's X-59 experimental supersonic plane reaches Mach 1.2 at 15 km altitude09 Sept 2026·1 event·1 sourceFollowHow events unfoldedFrom the beginning to today09/09/2026, 12:58NASA's X-59 experimental supersonic plane reaches Mach 1.2 at 15 km altitude1 source →1 of 1 eventsStoryline coverage1 source · 1/7