More than 1.5 million Nigerians displaced by the militant group Boko Haram are flocking to relief centres across the country's northeast, where they are met with overcrowded facilities and a shortage of supplies. Boko Haram's five-year insurgency continues to leave a trail of despair and desperation. Nearly 10,000 people now stay in the Damare camp in Adamawa where there are not enough toilets and a persistent health threat looms.