Obama's whirlwind Ghana trip

US President Barack Obama walks with his daughter Malia alongside first lady Michelle Obama and Sasha Obama during their tour of the Cape Coast Castle, a former slave holding facility, in the town of Cape Coast, Ghana, July 11, 2009. [Agencies]

A tour guide shows a cannon ball to US President Barack Obama (L) and his daughters Sasha (C) and Malia Obama during their tour of the Cape Coast Castle, a former slave holding facility, in the Ghanaian town of Cape Coast, July 11, 2009.[Agencies]