Zack Shellenberger, 14, center, and Nicole Greer, 13, right, try to keep their attention focused on Dr. Richard Stack of Mercy Sleep Center in this 2006 photo.
Zack Shellenberger, 14, center, and Nicole Greer, 13, right, try to keep their attention focused on Dr. Richard Stack of Mercy Sleep Center in this 2006 photo. Lezlie Sterling The Sacramento Bee
Zack Shellenberger, 14, center, and Nicole Greer, 13, right, try to keep their attention focused on Dr. Richard Stack of Mercy Sleep Center in this 2006 photo. Lezlie Sterling The Sacramento Bee