MARY LOUISE KELLY, HOST:For Grateful Dead fans, this week is known as the Days Between, marking the days between the anniversaries of the birth and death of Jerry Garcia. (SOUNDBITE OF ARCHIVED RECORDING)THE GRATEFUL DEAD: (Singing) Half-step, Mississippi uptown, toodeloo. Earlier this summer, he drove 10 hours from Eugene, Oregon, to a Grateful Dead tribute show in Monte Rio, California. Twenty-three-year-old Tyler Goodmoore discovered the Grateful Dead last year through a friend she made at a Santana concert. (SOUNDBITE OF SONG, "RIPPLE")THE GRATEFUL DEAD: (Singing) Let there be songs to fill the air.