[sigh]
The Bell X-1 was the first aircraft to pass the speed of sound DURING SUSTAINED, LEVEL FLIGHT.
bIbepnISbe'. lugh De'. wab Do charghta' X-1 puvqu'taHvIS. pumqu'taHvIS latlh loQ Dovetlh luqaDpu', 'ach Woody vuD yIqaw:
«bIpuvlI'be' jay'. bIpumlI'...'ej bIbaw'chu'!»
-- ghunchu'wI'