Return to Forever performing the Stanley Clarke composition 'Vulcan Worlds' in Chicago, 1974. Some fun split-screen footage. Chick Corea - keyboards Al Di Meola - guitar Stanley Clarke - bass Lenny White - drums This performance (and the whole show - a double bill of RTF and Herbie Hancock's Headhunters) was produced by WTTW Chicacgo and distributed by PBS I believe. To the best of my research,