Terror in Nigeria
New hope for Nigeria's missing schoolgirls
Haunted by loss: Chibok parents share their stories
Taken girls of Nigeria
Chibok kidnapping: New 'proof of life' video
Proof of life for some kidnapped Chibok schoolgirls
Orphaned by Boko Haram
Boko Haram victim: I was left to die
Have missing Nigerian girls been spotted?
Parents outraged over missing schoolgirls
Escaped Nigerian schoolgirls speak out
Source: 63 girls escape Boko Haram
Was ransom money funneled to Boko Haram?