Vivian Campbell, the long time guitarist of Def Leppard, been’s battling cancer off and on for years.  Unfortunately, the disease is back, but he keeps on fighting.  How hard is it to battle cancer while on the road with a huge classic rock band?  Vivian talks treatment, and his mental state while on a huge tour with Def Leppard with the Norton show.  Click on the audio below for the complete interview with Vivian Campbell.