The AU's special envoy Olusegun Obasanjo holds talks in Ethiopia

The former Nigerian President Olusegun Obasanjo, who is currently the African Union's special envoy for the Horn of Africa, is in Ethiopia to negotiate peace talks with all sides in the Ethiopian-Tigray conflict. Plus a human rights group investigating the cobalt mining industry in the Democratic Republic of Congo, says workers are subjected to dire conditions and abuse. And we hear about a new exhibition that is bringing to life voices from southern Nigeria that were recorded more than a century ago.