 one incarnation aired complete on MTV, another produced  by ABC was in two parts, part one (the first eleven hours) airing in  syndication, part two (the final three hours) airing on ABC. In any case, the  DVD version is edited to ten hours, leaving out many key performances, such  as Crosby, Stills, Nash and Young, Power Station, The Hooters, The Four Tops,  Rick Springfield, Bernard Watson, Santana, and Led Zeppelin. The DVD version  also contains an aurally altered version of Paul McCartneys performance of  "Let It Be" (due to a microphone problem in the first half of the song,  McCartney had to re