“Members of the “Big Four”, including Dave Mustaine, Lars Ulrich (Metallica), Scott Ian (Anthrax) and Kerry King (Slayer) recorded a special video tribute to the late, great heavy metal singer Ronnie James Dio (DIO, Heaven & Hell, Black Sabbath, Rainbow) from the Sonisphere festival in Sofia, Bulgaria on June 22, 2010. The video tribute was shown as part of the June 22nd satellite broadcast of the “Big Four” concert from Sofia to movie theaters around the world. Watch the six-minute video clip below.”