Today marks 500 days since the Chibok girls were kidnapped. Relatives of the missing schoolgirls are expected to hold a youth march and candle-lit vigil in the Nigerian capital Abuja. Muslim and Christian prayer services and a tree planting ceremony will also take place. In April last year, Boko haram invaded Chibok secondary school in Nigeria's Borno state and made way with nearly 276 school girls. That sparked international criticism over how Nigeria's government was handling the situation. Nigeria's recently elected President Muhammadu Buhari has made it his mission to not only crush the Boko Haram insurgency, but also to get the girls back.