FACTBOX - 10 facts about Boko Haram and Nigeria's missing Chibok schoolgirls
Since 2009, Boko Haram has waged an insurgency to carve out an Islamic state in northeast Nigeria that has displaced more than two million
EXCLUSIVE - 'I just want to go home', says first Chibok schoolgirl rescued from Boko Haram
Amina Ali and her baby were rescued in May, more than two years after being kidnapped by Boko Haram
In Brazil's 'Wild West' a young prosecutor takes on corrupt land deals
Why this local prosecutor wants to clean up his state's reputation as a place for shady land deals
Missing documents, wary residents delay biggest survey of Mumbai slums
"Every time, the government brings in someone who knows nothing about slums to do a survey. Naturally, they don't have much success"
U.S. losses from hurricanes set to soar by 2100 - researchers
In the U.S., the increased cost of hurricanes may outpace economic growth if climate change is not curbed, research shows
Outbreak of yellow fever in DR Congo could go global, children's charity warns
Massive vaccination campaign under way in central Africa, where an outbreak of the haemorrhagic virus has killed hundreds of people
Yemen is a "pressure cooker", aid groups warn amid outrage over school airstrike
Aid agencies say well over 2,000 children have been killed or wounded since the start of the war
Parents of Nigeria's missing Chibok girls 'wounded' after watching Boko Haram video
"We are praying ... that we can one day see our daughters. If not, there is nothing you can say now"
'Favela chic' will price us out of our homes: Rio's slum residents speak out
"Favela chic" has seen parts of informal settlements once synonymous with poverty and violence become fashionable, home to edgy art galleries and up-market cafes
Senegal floods expose need for community warning, preparation
"We were completely powerless - so much so that all we could do was abandon our homes and gather on the village square"