Slipknot are bringing Knotfest back to The States, with a three day festival in San Bernardino, CA. The announcement was made during the Mayhem Fest in San Bernardino today (July 5). Knotfest will take place October 24-26, and will feature Slipknot, Danzig, Five Finger Death Punch, Volbeat, Butcher Babies, Anthrax and many more!