Mike Bloomfield, Al Kooper, and Steven Stills. This was orignally a collaborative between Bloomfield and Kooper, but when Bloomfield walked out, he phoned up his buddy Steven Stills to finish off the album. 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. Read more on Last.fm