Tensions rise between Ethiopia, Egypt and Somalia

The arrival of Egyptian military planes in Somalia ratchets up tensions between Ethiopia and Somalia, raising tensions in the already fragile Horn of AfricaA dam bursts in Sudan killing at dozens of people, intensifying the suffering of a country already facing the ravages of war - we ask why dams fail so often in Africa?And doctors in Nigeria have been striking to demand the release of one of their colleagues kidnapped by bandits.