Nelson Mandela's Widow Calls on Nigerian Government to Find Kidnapped Girls.

Nelson Mandela's widow Graca Machel has broken a customary mourning period to call on the Nigerian government and international community to do more to find the 200-plus schoolgirls kidnapped by Boko Haram.
Here is what she said;
            "The Nigerian government has a responsibility to protect its citizens, and keep them safe," she said in an open letter, amid allegations that the authorities ignored a warning of the April 14 attack by the Islamist group.