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A Biafra flag flies beside a placard on May 30, 2017 in Abidjan, during commemorations 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) -- have called for a day of reflection. / AFP PHOTO / Sia KAMBOU (Photo credit should read SIA KAMBOU/AFP/Getty Images)

A Biafra flag flies beside a placard on May 30, 2017 in Abidjan, during commemorations 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) -- have called for a day of reflection. / AFP PHOTO / Sia KAMBOU (Photo credit should read SIA KAMBOU/AFP/Getty Images)
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AFP SIA KAMBOU

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Pro-Biafra supports demonstrate on May 30, 2017 in Abidjan, during commemorations 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) -- have called for a day of reflection. / AFP PHOTO / Sia KAMBOU (Photo credit should read SIA KAMBOU/AFP/Getty Images)

Pro-Biafra supports demonstrate on May 30, 2017 in Abidjan, during commemorations 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) -- have called for a day of reflection. / AFP PHOTO / Sia KAMBOU (Photo credit should read SIA KAMBOU/AFP/Getty Images)
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AFP SIA KAMBOU

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Veterans of the Nigerian civil war, wearing the red, green and black of the Biafra flag, are received by political activist and leader of the Indigenous People of Biafra (IPOB) movement Nnamdi Kanu (not pictured) at the garden of Kanu's house in Umuahia, southeast Nigeria, on May 26, 2017, before the 50th anniversary of the war to be commemorated on May 30. The war was triggered when the Igbo people, the main ethnic group in the southeast, declared an independent breakaway state, the Republic of Biafra. / AFP PHOTO / MARCO LONGARI (Photo credit should read MARCO LONGARI/AFP/Getty Images)

Veterans of the Nigerian civil war, wearing the red, green and black of the Biafra flag, are received by political activist and leader of the Indigenous People of Biafra (IPOB) movement Nnamdi Kanu (not pictured) at the garden of Kanu's house in Umuahia, southeast Nigeria, on May 26, 2017, before the 50th anniversary of the war to be commemorated on May 30. The war was triggered when the Igbo people, the main ethnic group in the southeast, declared an independent breakaway state, the Republic of Biafra. / AFP PHOTO / MARCO LONGARI (Photo credit should read MARCO LONGARI/AFP/Getty Images)
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AFP MARCO LONGARI

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Pro-Biafra supports demonstrate on May 30, 2017 in Abidjan, during commemorations 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) -- have called for a day of reflection. / AFP PHOTO / Sia KAMBOU (Photo credit should read SIA KAMBOU/AFP/Getty Images)

Pro-Biafra supports demonstrate on May 30, 2017 in Abidjan, during commemorations 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) -- have called for a day of reflection. / AFP PHOTO / Sia KAMBOU (Photo credit should read SIA KAMBOU/AFP/Getty Images)
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AFP SIA KAMBOU