SEHAM ELORABY and BAZ RATNER ETHIOPIAN farmer Berhan Halie came to Sudan 35 years ago to escape hunger. Now 65 and walking with a stick, he is back again, this time to escape the bullets and bombs of the conflict in Tigray, fleeing from his village as neighbours lay dead on the ground. Berhan and his family spent days walking to the border crossing with Sudan, among more than 45,000 who have fled from fighting between the Ethiopian government and rebellious Tigray forces. After crossing two weeks ago, he was brought by bus to the Um Rakuba camp in Sudan's…