Campaigners refuse to let kidnapped Nigerian girls be forgotten

Bring Back Our Girls campaign
A sign bearing the name of one of the missing Chibok schoolgirls, Naomi Zakaria, is placed close to Christmas decorations on December 17, 2014, at Ikoyi, in Lagos, by civil society campaigning for the release of the abducted girls.
Pius Utomi Ekpei | AFP/Getty Images