History was made on June 22 in Sofia, Bulgaria, as Metallica, Slayer, Megadeth, and Anthrax ??? the "Big Four" of 1980s thrash metal ??? joined forces onstage for the finale, a cover of the Diamond Head classic, "Am I Evil?". The Sofia concert will see a DVD/Blu-Ray release later this year showcasing the entire concert including two hours of Metallica, and one hour each of Slayer, Megadeth and Anthrax. The 2-disc package is due out in September and will include the "Am I Evil?" jam, backstage footage, and interviews.