The album Super Session grew out of a single nine hour jam in 1968 by guitarist Mike Bloomfield and multi-instrumentalist Al Kooper and Stephen Stills of CSNY fame. Kooper and Bloomfield had both previously worked in support of Bob Dylan, in concert and appearing on his ground-breaking classic, Highway 61 Revisited. Kooper, fresh from having assembled and recorded the inaugural incarnation of Blood, Sweat & Tears, booked two days of studio time with Bloomfield in May 1968 in Los Angeles. Read more on Last.fm