US Permanent Representative to the United Nations Samantha Power (C) interacts with a mother in Malcohi Settlement in Yola, Adamawa State on April 22, 2016.
US Ambassador to the United Nations Samantha Power arrived in Nigeria as part of a three-country tour of West and Central Africa to hold talks with Muhammadu Buhari on the growing threat Boko Haram poses to the Lake Chad Basin region and to develop a more coordinated military campaign against the Islamists.  / AFP / Randy HANIEL        (Photo credit should read RANDY HANIEL/AFP/Getty Images)