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U.S. President Barack Obama (C) reviews a marsh band during a welcome ceremony at the National Palace in Addis Ababa, Ethiopia July 27, 2015

Tiksa Negeri/Reuters

U.S. President Barack Obama (C) reviews a marsh band during a welcome ceremony at the National Palace in Addis Ababa, Ethiopia today.

President Barack Obama shakes hands and meets Tanzanians during an official arrival ceremony hosted by Tanzania President Jakaya Kikwete and First lady Salma Kikwete in Dar Es Salaam

Gary Cameron/Reuters

US President Barack Obama shakes hands with Tanzanians during an official arrival ceremony hosted by Tanzania President Jakaya Kikwete and First lady Salma Kikwete in Dar Es Salaam.