Two years ago, 276 school girls were kidnapped in Nigeria by Boko Haram. Since then, some have been freed, others escaped and at least six have died. This hour, we’ll talk about how the kidnapping has affected families – and about ongoing efforts to rescue the remaining students – with Helon Habila. He’s the author of “The Chibok Girls: The Boko Haram Kidnappings and Islamist Militancy in Nigeria” (Columbia Global Reports).