American composer Elliott Carter has died, age 103. Carter received the Pulitzer prize twice, for his String quartet No 2 and No 3, in 1960 and 1973 respectively. He was encouraged to take up a career in classical music by Charles Ives, and composed throughout his lifetime, finishing his final piece of music in August 2012. As such, he had been described as the "Methuselah of American Composers". He steadfastly refused to work to deadlines, and composed music which some trained musicians found incredibly difficult to grasp. Nonetheless he received frequent commissions, and by the 1980s his works were performed on a regular basis.