Children under the auspices of Chibok Girls Ambassadors march to press for the release of 219 schoolgirls abducted by Boko Haram Islamists militants during a demonstration at ministry of education in Abuja, on April 14, 2015. Nigeria's president-lect Muhammadu Buhari cautioned he could not make promises on the return of 219 schoolgirls kidnapped by Boko Haram, as the country marked the first anniversary of their abduction.AFP PHOTO/STRINGER (Photo credit should read -/AFP/Getty Images)
