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Shackles used during the slave trade are displayed at the Cape Coast Castle Museum in Cape Coast, Ghana, Aug. 28, 2010. Established as a fortress for the trade of gold and other valuable resources, the castle was later used as a dungeon for holding slaves before their transfer to the Americas. It is estimated that around 1 million slaves were transported from what is now Ghana to the Americas between the 1600s and the middle of the 19th century. (CNS/Nancy Wiechec)