(CNN) – They were stolen from their beds in a school dormitory — hundreds of teenage girls kidnapped by gunmen. A few dozen escaped to tell of the night that Boko Haram militants brought terror to a Nigerian girls’ school. From the rest, silence. No sign of where they had been taken or what could have happened to them for almost two years, even as the world screamed #BringBackOurGirls. Hundreds of parents left, day after day, night after night, and then months with no information. Until now.