I linked this video in the youtube all stars, but the more I thought about it the more awesome this video became. Metallica, ACDC, Pantera & more live in Moscow circa 1991. The atmosphere speaks for itself with the military personnel and helicopters flying around. "Largest crowd ever in a Monsters of Rock Festival, with estimates between 700,000 and 1.6 million people, considered as one of the most attended rock concerts in history." Focus: What is the most memorable concert you have ever been too? Bonus points for pictures / video.