The old-school metal tour featuring Slayer, Megadeth, and Testament has been rescheduled for August 31st at the Cow Palace. Originally scheduled for earlier this year, the tour had to be postponed following a headbanging injury and surgery for Slayer vocalist/bassist, Tom Araya. Tickets purchased last year will be honored at the new date. It’s the first time that Slayer, Megadeth and Testament will have toured the US together since 1991's "Clash of the Titans" tour. In other words, prepare for a Heavy Metal Parking Lot redux.