Bob Marley was the undisputed king of reggae music. When he died of cancer in 1981 he was just 36 years old. Marley left behind many songs, a legion of adoring fans, and quite a few talented children to carry on his legacy. This summer, for the first time ever, five of Marley’s sons — Ziggy, Stephen, Julian, KyMani and Damian — are paying tribute to their father with the Bob Marley Roots, Rock Reggae Festival. Trey Kay met up with the brothers at a show in Virginia.