For the past year, the photographer Adam Ferguson and I have met with hundreds of victims of Boko Haram.

Girls who were forced to have bombs strapped to them. People who were living along a highway after militants displaced them three or four times from their homes. University students who carried on while under threat from bombings.

But we’d never managed to talk to the group of students from Chibok, in Nigeria, who were released after a high-profile kidnapping in 2014 that inspired the social media hashtag #BringBackOurGirls and brought international attention to the group.