On May 13, 1939, the eve of the Second World War, the MS St. Louis left port in Hamburg, Germany, headed for Havana, Cuba. Among the ship's passengers were more than six hundred Jews attempting to escape Nazi rule. But most of the visas the passengers had purchased turned out to be fake and after several days in limbo in Havana's harbour, the ship's captain turned back for Europe. Canadian and American activists petitioned their governments...