Earl Scruggs, whose distinctive picking style and association with Lester Flatt cemented bluegrass music's place in popular culture, died Wednesday of natural causes at a Nashville hospital, his son Gary Scruggs said. He was 88. "I realize his popularity throughout the world went way beyond just bluegrass and country music," Gary Scruggs told CNN. "It was more than that." For many of a certain age, Scruggs' banjo was part of the soundtrack of an era on "The Ballad of Jed Clampett" -- the theme...