ETHIOPIA-US-OBAMA-DIPLOMACY

US President Barack Obama (R) looks at a bone fragment from "Lucy" who was estimated to have lived 3.2 million years ago, shown by Dr. Zeresenay Alemseged Lemseged (L), head of the California Academy of Sciences, prior to a State Dinner at the National Palace in Addis Ababa, July 27, 2015. US President Barack Obama praised key African ally Ethiopia for its fight against Shebab militants in Somalia, but also challenged Addis Ababa on its democratic record. Obama is on the first-ever trip by a US president to Africa's second most populous nation, a close strategic partner for Washington credited for beating back the Al-Qaeda-affiliated Islamists but a country also much criticised for its rights record. AFP PHOTO / SAUL LOEB (Photo credit should read SAUL LOEB/AFP via Getty Images)