A man carrying a Boko Haram flag walks past a group of 82 Chibok girls, who were held captive for three years by Islamist militants, as the girls wait to be released in exchange for several militant commanders, near Kumshe, Nigeria May 6, 2017.

A man carrying a Boko Haram flag walks past a group of 82 Chibok girls, who were held captive for three years by Islamist militants, as the girls wait to be released in exchange for several militant commanders, near Kumshe, Nigeria May 6, 2017.

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