Singer-songwriter David Crosby of Crosby, Stills & Nash dies at 81

 Singer-songwriter David Crosby of Crosby, Stills & Nash dies at 81

Two-time Rock and Roll Hall of Famer David Crosby has died, a reliable source told ABC News on Thursday. The singer was 81.
Born in Los Angeles in 1941, Crosby launched his career as a member of the…