On this day in space! Oct. 14, 1947: Chuck Yeager smashes the sound barrier. 

 On Oct. 14, 1947, Chuck Yeager smashed the sound barrier in the secret experimental X-1 aircraft. 

https://cdn.mos.cms.futurecdn.net/vAoqMrgVLnW5fTPmbwpupL.jpg

https://www.space.com/39251-on-this-day-in-space.html