Chuck Yeager vs the speed of sound 💥 Today in 1947, Chuck Yeager became the first person to break the sound barrier in level flight, flying the Bell X-1 "Glamorous Glennis” and reaching Mach 1.06. Bell X-1 was the first in a series of supersonic aircraft which continue to push the boundaries of what's possible in aviation. Bell X-1 is in on display in the "Boeing Milestones of Flight Hall" at our Museum in DC. The inside of the aircraft contains additional interesting details, including a signature from Yeager and the date of his historic flight. #AirSpacePhoto