uses red, white, and blue, and it's a design, actually, that was submitted by a soldier named leroy reeves. and the three stars represent the three parts of the state of tennessee. there's western tennessee, between the tennessee and mississippi rivers. there's middle tennessee, which is known for the tennessee river and also bluegrass country. and then the great smoky mountains are in the eastern part of tennessee, and that's what the third star is meant to represent. >> the design celebrates unity by enclosing all three stars within a circle. and the red, white, and blue colors celebrate tennessee's unity with america. a distinctive blue edging ensures that the flag can be easily recognized, even on days when there's no breeze to unfurl it. with "flag facts," i'm scott. >> when we talk about healthcare, many of us think of doctors, but it's actually a growing field made up of many professions. erika reports on one that offers "sound" opportunities. >> whether you're in a lush forest... [ horn honks ] ...or on a busy city street, hearing plays an important role in our daily lives. >> what