Billy Crystal's '15 Rounds' of Muhammad Ali

Go back to 1979, when Billy Crystal performed a one-man show representing 15 rounds in the life of Muhammad Ali.

Inside Jim Irsay's rock 'n' roll time capsule heading to auction at Christie's

The late Jim Irsay, longtime owner of the Indianapolis Colts who died last year, spent decades assembling one of the most eclectic private collections of American popular culture ever gathered.