article_snippet: As we have learned with ISIS in Iraq and Syria, any unaddressed local insurgency has the potential to spiral into an international problem.
article_snippet: Just this year alone, the extremists have killed at least 1,000 civilians, Human Rights Watch says.
article_snippet: One of the militants most brutal acts was the kidnapping of nearly 300 schoolgirls last April, a majority of whom are still missing.
article_snippet: Boko Haram has become increasingly brazen, seizing towns in bloody attacks and declaring towns in bloody attacks Islamic caliphates.
article_snippet: Militants have bombed schools, churches and mosques; kidnapped women and children; and assassinated politicians and religious leaders alike.
article_snippet: CNN's Christian Purefoy contributed to this report.