Increasing numbers of Ethiopians and Somalis fleeing war, drought and poverty in their home countries face arrest, deportation and detention as they try to make their way to the south of the continent. For most the goal is South Africa - the only country in the region where refugees and asylum seekers have freedom of movement and the right to work rather than being confined to camps. But as the number of migrants from the Horn of Africa seeking asylum in South Africa has reached unprecedented levels, border authorities have started refusing them entry.