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When the 'Big Four' - Metallica, Slayer, Megadeth and Anthrax - shared a stage together on 22nd June 2010 in Sofia, Bulgaria, the show was beamed live into over 550 theatres worldwide via satellite in a special HD cinematic event. The Big Four Live from Sofia includes full shows from all four bands as well as behind the scenes and interview footage. The legendary concert from the Sonisphere Festival was one of only 7 shows across Europe when the four monsters of metal shared a stage for the first time.