In the summer of 1964 writer Ken Kesey and his Merry Band of Pranksters set off on a psychedelic journey - experimenting with LSD while driving across America in a converted school bus. Immortalised in the book The Electric Kool Aid Acid Test, their trip would become one of the defining moments of American counterculture. Witness has been speaking to surviving Prankster Ken Babbs.
Picture: Ken Kesey on April 24, 1997 in Springfield, Oregon, with his bus, 'Further' (AP Photo/Jeff Barnard, File)