At 92, Cameroon's President aul Biya is running for an eighth term on Sunday — a reminder of how Africa's aging leaders continue to cling to power, even as their nations face unrest, corruption, and calls for change.
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October 11 is the "International Day of the Girl" on the United Nations calendar. These photos pay tribute to the spirit of girls in a world where they face many obstacles.
(Image credit: Danielle Villasana)