"The Clash then  recorded London Calling ... the double album was a mix of punk rock, rockabilly, reggae, rock and roll, ska and other elements that recalled the band's earlier days, but also had greater maturity and production polish, and is regarded as one of the greatest rock & roll albums ever recorded. ...In late May and early June 1981, the Clash played a series of 17 shows at Bond's Casino in New York's Times Square.
The Clash planned to record and release a single every month in 1980. Their record label, CBS, balked at this idea, and these efforts resulted in the album Sandinista! [released December 1980]. Containing elements of rock, punk, reggae (including extended dubs), ska, jazz, and disco, unified by a heavily echoed sound, this 3-LP, 36-song album was their most controversial to date, both politically and musically."
The opening acts during their three-week residency were as eclectic as the band's repertoire: Grandmaster Flash & The Furious Five, Bad Brains, the Slits, Lee Perry, the Fall and the Dead Kennedys. All of the shows circulate; the June 9 was professionally recorded/broadcast.