ETHIOPIA-US-DIPLOMACY

US President Barack Obama (2nd R) touches a bone fragment of "Lucy", who was estimated to have lived 3,2 million years ago, alongside Ethiopian Prime Minister Hailemariam Desalegn (R) and Zeresenay Alemseged (2nd L), head of the California Academy of Sciences, prior to a State Dinner at the National Palace in Addis Ababa, Ethiopia, on July 27, 2015. Discovered in 1974 by American anthropoligist Ronald Johanson in Ethiopia, several hundred pieces of bone represent about 40 percent of the skeleton of a female body providing a unique look at human evolution. AFP PHOTO / SAUL LOEB (Photo credit should read SAUL LOEB/AFP via Getty Images)