NIGERIA. May 30, 2017. A security guard in an empty alley way in Ogbaru Market, during a shutdown in commemoration of the 50th anniversary of the Nigerian Civil War. Nigeria on May 30 marks 50 years since the declaration of an independent Republic of Biafra plunged the country into a civil war, amid renewed tensions and fresh calls for a separate state. The main pro-independence groups – the Indigenous People of Biafra (IPOB), and the Movement for the Actualisation of the Sovereign State of Biafra (MASSOB) – called for a day of reflection.

Photograph: Stefan Heunis/AFP/Getty