On the two-year anniversary, a Christian anti-persecution charity is bringing the case of the 276 abducted girls to the attention of the International Criminal Court, to speed up finding them.
Robert Clarke, from ADF International, told Premier: "The difficulty I think is that these can become numbers - when we talk about 276 school girls, these are 276 invidual girls, they're sisters, they're daughters, they're friends, and when this happens in a far away place.
"It can be very easy for them to just become a statistic."
"These are people - they deserve our prayers, they deserve our action, this isn't a Nigeria problem, this is a worldwide problem, and the world needs to respond."
It is thought that 57 girls escaped while the remaining 219 teenagers were reportedly forced into marriages or sold into slavery.
Robert added: "This is an international terrorist organisation that has published and publicised its allegiance to ISIS (Islamic State) in the Middle East, and yet it gets decidedly less coverage, less criticism and less action than we've seen in recent months against ISIS."
Our prayers are with the missing Nigerian girls and their families. It's time to #BringBackOurGirls. -mo pic.twitter.com/glDKDotJRt
— The First Lady (@FLOTUS) 7 May 2014
The Twitter hashtag and campaign #BringBackOurGirls was founded following the abduction and world leaders voiced their support.
The Prosecutor of the International Criminal Court has been investigating the situation in Nigeria since 2010, before the kidnapping took place.
Listen to Premier's Hannah Tooley speak to Robert Clarke here:
Listen to Premier's Hannah Tooley speak to Revd Benjamin Kwashi, Bishop of Jos in Nigeria, here:
Listen to Premier's Alex Williams speak to Beth Fuller here:
