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20 Years of Jethro Tull (1988) is a video by Jethro Tull, also known as Jethro Tull: This Is the First 20 Years. It consists of interviews with fans, frontman Ian Anderson, Terry Ellis and Chris Wright of Chrysalis Records, and John Gee of the Marquee Club, giving a rough chronology of the band, interspersed with clips from music videos and live performances. Many of the live performances are culled from the Madison Square Garden performance during the 1978 Heavy Horses tour.