One of the most fascinating rock bands ever, Pink Floyd was formed in 1965. After a year in the London 'underground' when they experimented with revolutionary techniques like lights which matched their music, they released their first single in 1966. Their breakthrough album, THE DARK SIDE OF THE MOON, was released in 1973 and stayed in the charts until 1982, the longest a record has ever been continuously in the charts, becoming one of the best-selling all-time albums. In 1975 they released WISH YOU WERE HERE which reached iconic status. THE WALL in 1979 went to number 1 in almost every country in the world. The movie version of THE WALL staring Bob Geldof was released in 1982 becoming a cult favorite. In the 1980s a rift developed between the band members which culminated in law suits. Only recently have there been reconciliations which have allowed founder member Nick Mason to write the definitive history of the band.