Boko Haram
UNICEF has scaled up its efforts to provide vaccines, education and safe drinking water.
And how one group is working to end it.
The militant group has killed thousands and forced over a million to leave their homes.
WHAT'S HAPPENING
The fighting has killed 20,000 and displaced 2 million.
Police say she was about 14 years old.
Several people were killed in the overnight raid.
Boko Haram has carried out multiple attacks in northern Nigeria.
