A Sahrawi refugees' tent is pictured in a refugee camp of Boudjdour in Tindouf
A Sahrawi refugees' tent is pictured in a refugee camp of Boudjdour in Tindouf, southern Algeria March 3, 2016. UN Secretary General Ban Ki-moon is scheduled to visit the Sahrawi refugees in south-west Algeria's Tindouf region. REUTERS/Zohra Bensemra