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Russian Marxist revolutionary Leon Trotsky (1879 - 1940, second from right) and his second wife, Natalia Sedova (1882 - 1962, far left), are greeted by Mexican painter Frida Kahlo (1907 - 1954) and Polish-born American Marxist theoretician and pro-union activist Max Shachtman (1904 - 1972) on their arrival in Tampico, Mexico, on board the the Norwegian tanker, Ruth, 9th January 1937. Trotsky, his wife and grandson have travelled to Mexico after being deported from Norway. (Photo by Fine Art Images/Heritage Images/Getty Images)