Dolly Parton, James Ingram, the Chieftains, Broadway's Kristin Chenoweth, bluegrass stars Earl Scruggs,Jerry Douglas, Tim O'Brien and Jeff White, and actor Craig Bierko headline the 22nd annual fireworks-capped gala, telecast from the Capitol's West Lawn in Washington, D.C. Other highlights include a tribute to composer-conductor John Williams. Erich Kunzel conducts the National Symphony Orchestra. Barry Bostwick hosts.