MEKELLE, Ethiopia — Dima Yehea's two-year-old son has large brown eyes and a sweet, carefree smile. He sits on his mother's lap wearing only an old T-shirt. Dima, dressed in a loose hospital gown, looks at me with intent, studious eyes. Her baby turns towards her, grabs her left breast with both hands and nurses for a few minutes. As the baby focuses on his meal, Dima concentrates on me, a Westerner in Ethiopia.