When the 'Big Four,' Metallica, Slayer, Megadeth and Anthrax shared a stage together on June 22nd, 2010, in Sofia, Bulgaria, it was the moment their fans had waited decades for. That monumental show was beamed live into over 1000 theaters worldwide via satellite in a special HD cinematic event. On November 2nd, 2010, this legendary concert will be available on DVD and Blu-ray t...