The reports are horrifying. Bullets flying overhead as school-age kids scream out in fear. Chaos. Shrapnel. Hundreds go missing.
This was the scene last week when militants stormed a high-school in Katsina, northern Nigeria, to abduct hundreds of students, 400 of whom remain missing. It's a horror story reminiscent of the 2014 kidnapping of schoolgirls that prompted the viral #BringBackOurGirls campaign championed by former US first lady Michelle Obama.
The attack, which has now been claimed by the militant group Boko Haram, comes just weeks after the brutal slaying of Nigerian farmers in Borno state by militants on motorcycles. (At least thirty of the victims were beheaded.)
Nigerians have grown increasingly furious at the government for not doing more to keep them safe. But what are the conditions that have allowed groups like Boko Haram and Islamic State cells to gain a foothold in Africa's most populous country and largest economy?