Will Ross, BBC Nigeria correspondent
It has been a whole year of agony for the relatives of the missing 219 Chibok girls. There have been a few sightings of some of the abducted students but very little official information from a government that has long promised to rescue them from the clutches of Boko Haram.
One mother told the BBC she sometimes arranges her 19-year-old daughter's clothes in the hope that she is about to return home.
The scale of this conflict is so grim that the Chibok girls represent just a fraction of those seized by the jihadists. Amnesty International says at least 2,000 women and girls have been abducted since the beginning of last year. Many have escaped partly thanks to a recent military offensive - but not the Chibok girls.