incident was the centerpiece of the documentary film Gimme Shelter. 1970–1974: Decline and dissolution Dryden was dismissed from the band in February 1970 by a unanimous vote of the other members. He felt burned out by four years on the "acid merry-go-round" and was deeply disillusioned by the events of Altamont, which, he later recalled, "did not look like a bunch of happy hippies in streaming colors. It looked more like sepia-toned Hieronymus Bosch." He took time off before returning to music the following year as Mickey Hart's replacement in the New Riders of the Purple Sage. Dryden was replaced by Hot Tuna drummer Joey Covington, who had already contributed additional percussion to Volunteers and performed select engagements with the Airplane as a touring second drummer in 1969. Later that year, the band was further augmented by the addition of veteran jazz violinist Papa John Creach, a friend of Covington who officially joined Hot Tuna and Jefferson Airplane for their fall tour in October 1970. Touring continued throughout 1970, but the group's only new recordings that year were the single "Mexico" backed with the B-side "Have You Seen the Saucers?" Slick's "Mexico" was an attack on President Richard Nixon's Operation Intercept, which had been implemented to curtail the flow of marijuana into the United States. "Have You Seen the Saucers" marked the beginning of the science fiction themes that Kantner explored in much of his subsequent work, including Blows Against the Empire, his first solo album. Released in November 1970 and credited to "Paul Kantner/Jefferson Starship," this prototypical iteration of Jefferson Starship (alternatively known as the Planet Earth Rock and Roll Orchestra) included David Crosby and Graham Nash; Grateful Dead members Jerry Garcia, Bill Kreutzmann, and Mickey Hart; session luminary Harvey Brooks; David Freiberg; and Slick, Covington and Casady. Blows Against the Empire peaked at No. 20 in the United States and was the first rock album nominated for the Hugo Award. Jefferson Airplane ended 1970 with their traditional Thanksgiving Day engagement at the Fillmore East (marking the final performances of the short-lived Creach-era septet) and the release of their first compilation album, The Worst of Jefferson Airplane, which continued their unbroken run of post-1967 chart success, reaching No. 12 on the Billboard album chart. 1971 was a year of major upheaval for Jefferson Airplane. Slick and Kantner had begun a relationship in 1970, and on January 25, 1971, their