Metallica, Slayer, Megadeth, and Anthrax performed on the same bill for the first time on June 16, 2010, at Warsaw Babice Airport, Warsaw, as a part of the Sonisphere Festival series. The show in Sofia, Bulgaria, on June 22, 2010, was broadcast via satellite to cinemas. The bands also played concerts in Bucharest on June 26, 2010, and Istanbul on June 27, 2010. On June 28, 2010, "Death Magnetic" was certified double platinum by the RIAA. Metallica's World Magnetic Tour ended in Melbourne on November 21, 2010. The band had been touring for over two years in support of "Death Magnetic". To accompany the final tour dates in Australia and New Zealand, a live, limited edition EP of past performances in Australia called "Six Feet Down Under" was released. The EP was followed by "Six Feet Down Under (Part II)", which was released on November 12, 2010. Part 2 contains a further eight songs recorded during the first two Oceanic Legs of the World Magnetic Tour. On November 26, 2010, Metallica released a live EP titled "Live at Grimey's", which was recorded in June 2008 at Grimey's Record Store, just before the band's appearance at Bonnaroo Music Festival that year.