System of a Down and The Mars Volta will be in concert in San Antonio Friday, August 12th at the SBC Center. System of a Down's newly-released album Mezmerize debuted at number one, selling 453,000 copies in the U.S. in the first week. The Mars Volta will be promoting their recently released and well-received album Francis the Mute. I cannot find tickets available online for this concert, but I will post when I find them.Technorati Tags: San Antonio - Concerts - System of a Down - The Mars Volta