My 'Heartache' Over Chibok Girls

Presidential candidate and former Secretary of State Hillary Clinton says the Chibok schoolgirls still being held by West African extremist group Boko Haram two years after their abduction are a "stark reminder of the work we must do to advance equality for women and girls."

In a statement provided exclusively to TIME on the second anniversary of the kidnapping, Clinton condemned Boko Haram and linked the kidnapping to larger problems facing women around the world.