(New York Times) – When three girls showed up Monday at a camp for people who had fled the militant group Boko Haram, they were welcomed and offered a place to sleep. But early Tuesday morning, as the first light spread across the sprawling camp, two of the girls blew themselves up with bombs they had been concealing, killing 58 people and wounding 78. The victims were among the more than 50,000 people who had been forced from their homes by Boko Haram’s rampages, only to be confronted with the same horror in the very place they had sought refuge.