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9. Slayer, Megadeth, Testament
Aug. 20 at UIC Pavilion
Copyright © 2009, The Chicago Tribune
Three bands that helped reinvent metal in the '80s demonstrate they haven't backed off a bit from their fearsome origins. Even with Tom Arraya (pictured) cutting way down on the headbanging after a recent neck injury, Slayer still blasts like a blowtorch. Perhaps because they lack the notoriety of the two headliners, Northern California veterans Testament play like hungry upstarts, devil's horns all around.