<human>:  Why did the first person to break the sound barrier do it?
<bot>: The first person to break the sound barrier was Chuck Yeager. He did it because he wanted to be the first person to break the sound barrier. He was a test pilot for the US Air Force, and he wanted to be the first person to break the sound barrier so that he could prove that the US Air Force was capable of flying faster than the speed of sound.