Ramatu Usman, shown here with one of her sons, is a 37-year-old mother of eight. She says she was separated from one of her sons, 6-year-old Yahaya Buba, following an attack. He is still missing.
People call for the Nigerian government to rescue girls taken from a secondary school in Chibok region, during a protest earlier this month. Boko Haram, the group that took the girls, says they have been "married off."
Zambia's then-opposition leader Michael Sata speaks to journalists during a news conference in Lusaka in 2006. Sata, who became president in 2011, died while being treated for an undisclosed illness in London.