Metallica - The Big Four - Live from Sofia, Bulgaria (2010)

On June 16, 2010, at the Sonisphere Festival at Bemowo Airport in Warsaw, Poland, the "big four" of American thrash metal—Metallica, Slayer, Megadeth, and Anthrax—performed together for the first time. Metallica was the fourth and last band to go on to play 18 songs.