(New York Times) -Dozens of the nearly 300 schoolgirls kidnapped by Boko Haram militants just over three years ago in the Nigerian village of Chibok have been released as part of an exchange for detained suspects from the militant group, a statement from Nigeria’s president said early Sunday. The release of the girls is by far the biggest breakthrough in a tragedy that has come to define the nearly eight-year war against Boko Haram, the Islamist militant group that has burned, killed and kidnapped its way across parts of West Africa, killing thousands and causing millions to flee for their lives.