Before war ravaged Yemen, Walid Al-Ahdal did not worry about feeding his children. At his hometown near the Red Sea, his family grew corn, raised goats and relied on their own cow for milk.But for the last four years, after fighting forced them to flee, their home has been a tent at a camp with 9,000 other families outside the capital city of Sana. Mr. Al-Ahdal has struggled to buy adequate food with his wages as a janitor at a hospital.Now another war — this one more than 2,000 miles away — has upended their lives again. Food prices are soaring. Since Russia invaded Ukraine, the cost of wheat has more than doubled, while milk has climbed by two-thirds.On many nights, Mr. Al-A …
