Missing Mexican students: Can art keep their memory alive?

Saturday marks one year since 43 students disappeared from a town in the southern Mexican state of Gerrero.

Their disappearance provoked protests on the streets as people vented their anger over government corruption and violence in the country.

But one year on, there is still no clear answer as to what happened to the students.

One Argentinian artist is trying to keep their memory alive with a new exhibition featuring 50 photographs that all carry one message.

Katy Watson reports.