Changes

'''Supersonic''' is a term used to describe things which fly faster than the [[speed of sound]]. At 70 degrees Fahrenheit (21 Celsius), for an object to fly faster than sound, it must travel 761 miles per hour (1224.71 kilometers per hour).  

'''Supersonic''' is a term used to describe things which fly faster than the [[speed of sound]]. At 70 degrees Fahrenheit (21 Celsius), for an object to fly faster than sound, it must travel 761 miles per hour (1224.71 kilometers per hour).  

American [[P-47 Thunderbolt]]s in World War II came close to supersonic speeds in a dive, but the first person to break the sound barrier in level flight was [[Charles Yeager|"Chuck" Yeager]] in the [[X-1]] experimental aircraft.

American [[P-47 Thunderbolt]]s in World War II came close to supersonic speeds in a dive, but the first person to break the sound barrier in level flight was [[American]] [[USAF|Air Force]] pilot [[Charles Yeager|"Chuck" Yeager]] in the [[X-1]] experimental aircraft.

[[Category:Science]]

[[Category:Science]]