From the first song with its tricky timing, through incredible harmonies and songs, songs, songs, Crosby Stills & Nash are towering giants in their genre. The blend of voices mesmerise as they expertly make one of the most difficult skills – singing live harmonies, seem effortless and easy.

RIP Bill Graham.

http://en.wikipedia.org/wiki/Bill_Graham_(promoter)

http://www.crosbystillsnash.com

http://en.wikipedia.org/wiki/Crosby,_Stills,_Nash_%26_Young