A malnourished child rescued by Nigerian soldiers from the Islamist militants Boko Haram in the Sambisa Forest sleeps on a mat at Malkohi refugee camp in Yola, on May 5, 2015. The refugees were among a group of 275 people rescued by the Nigerian military last week and arrived at the camp on May 2, 2015. The freed hostages, among almost 700 women and children rescued from Boko Haram's clutches last week, had been traumatised and malnourished by their ordeal, the military said. AFP PHOTO/EMMANUEL AREWA        (Photo credit should read EMMANUEL AREWA/AFP/Getty Images)