Africa and the rest of the world were this week breathing a sigh of relief after the Ethiopian government and Tigrayan leaders signed a truce in Pretoria to end the two year brutal war in the north of the country.  The agreement gave fresh hope of opennng up the flow of aid and other humanitarian assistance to those at risk of famine.  More than a million people have been displaced since heavy fighting resumed in August and many are dying of treatable diseases as hospitals have run out of basic drugs. Questions however remain over whether the truce will succeed. We spoke to our Ethiopia correspondent, Coletta Wanjohi