Haidjia Fandaou tells us how she came across her brother 's lifeless body in the middle of her escape . CNN 's Arwa Khan went to the Niger - Nigeria border in search of Boko group . Islamist militant group has terrorized Nigeria 's northeastern Borno State in recent years . Group abducted nearly 100 schoolgirls in Borno in 2015 ; officials are still searching for them . Thousands of Nigerians have fled across the border with Niger to avoid the violence .
CNN 's Arwa Khan went to the Niger - Nigeria border in search of Boko group . Islamist militant group has terrorized Nigeria 's northeastern Borno State in recent years . Group abducted nearly 100 schoolgirls in Borno in 2015 ; officials are still searching for them . Thousands of Nigerians have fled across the border with Niger to avoid the violence .