We toured Cape Coast Castle, a place for centuries where men, women, and children of this nation and surrounding areas were sold into slavery. I'll never forget the image of my two young daughters, the descendants of Africans and African Americans, walking through those doors of no return, but then walking back those doors of return. It was a remarkable reminder that while the future is unknowable, the winds always blow in the direction of human progress.

Barack Obama: "Remarks Prior to Departure from Accra, Ghana," July 11, 2009. Online by Gerhard Peters and John T. Woolley, The American Presidency Project.

Barack Obama: Remarks Prior to Departure from Accra, Ghana[presidency.ucsb.edu]