If one single song is indelibly associated with Johnny Cash, it has to be I Walk The Line – the song that landed him his first American hit in October 1956. But for many, Cash is defined by a single line from Folsom Prison Blues. I shot a man in Reno, just to watch him die confirmed Cash as a hard-living, fast-shooting guy (Dont Take Your Guns To Town; Bonanza!) and also saw him identifying with prisoners and prison life. The Man in Black had become a friend of Presidents and pop idols; a man whom stars like Bono and Bob Dylan deferred to; a legend courted by fans such as Quentin Tarantino and Johnny Depp. And though a lot has been written about Johnny Cash since he died in 2003, questions remain about how this man came to dominate the world of popular music – but here, in your hands, are sixteen reasons why…