KNOTFEST Returns To San Manuel Ampitheater in San Bernardino, CA, October 23-25; Over 50 Of The Biggest Bands in Heavy Music To Rock 4 Epic Stages Lineup Includes: Slipknot, Judas Priest, Korn, Bring Me The Horizon, Mastodon, Trivium, Corrosion Of Conformity, Clutch, Mobb Deep, Ghostface Killa, Cannibal Corpse, Suicidal Tendencies,