Compositions   1926: Piano Concerto 1936: El Salón México 1938: Billy The Kid 1940: Quiet City 1942: Danzón Cubano 1942: Rodeo 1944: Appalachian Spring 1954: The Tender Land 1959: Dance Panels 1973: Threnody 1 & 2	World Politics 1914: First World War 1929: Wall Street Crash     1939: Second World War     1949: Mao declares Chinese Republic   1961: Berlin Wall built   1975: End of Vietnam War