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Nancy Pelosi says seeing where slaves were kept before going across the Atlantic has been transformative.
BBC World Service
The Speaker of the US House of Representatives, Nancy Pelosi, has given an emotional address to parliament in Ghana on the 400th anniversary of the first enslaved Africans arriving in America.
Ms Pelosi appeared tearful as she recalled the horrors of the slave trade.
She paid tribute to the contribution African Americans had made to the United States and said that Ghana's struggle for independence had been an inspiration for the civil rights movement led by Martin Luther King and others.