Venezuelan maestro Gustavo Dudamel, conductor of Venezuela's world-famous Simon Bolivar National Youth Orchestra, conducts the San Francisco Berkeley University Orchestra during a masterclass in San Francisco, California, on November 27, 2012 before the kick off of a US tour on November 29. The Simon Bolivar National Orchestra is part of 'The System' or Social Action for Music, conceived by Venezuelan conductor and composer Jose Antonio Abreu is a state foundation that supports youth orchestras to encourage children from poor backgrounds to adapt to school and society while learning musical instruments with orchestra members. AFP PHOTO/LEO RAMIREZ (Photo credit should read LEO RAMIREZ/AFP/Getty Images)