In just a matter of years, Africa has become the "global epicentre of terrorism", with groups such as Da'esh, Al-Qaida and their affiliates exploiting local conflicts and fragilities to serve their own ends, the UN Secretary-General said on Wednesday, calling for violent extremism to be rooted out.
A Nigerien military convoy on a counter-terrorism patrol in the Sahara Desert. UNICEF/Ashley Gilbertson