The two-disc DVD release of "The Big Four: Live From Sofia, Bulgaria", containing footage of the June 22, 2010 Sonisphere cinecast from the Sofia, Bulgaria leg of the touring rock festival featuring the "Big Four" of 1980s thrash metal METALLICA, SLAYER, MEGADETH and ANTHRAX has been certified double platinum by the Recording Industry Association of America (RIAA) for shipments in excess of 10

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