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The Sister Cities movement was founded by President Dwight D. Eisenhower on September 11, 1956. His vision was to involve citizens of the world in a grass-roots effort to promote peace through mutual understanding and respect. This initial act of "sistering" led in 1967 to Sister Cities International (SCI), which now unites tens of thousands of citizen diplomats and volunteers in 570 member communities with over 2,300 partnerships in 150 countries on six continents.