SANA’A, Yemen, 16 October 2017 – “He is very weak and cannot even walk anymore. He’s lost so much weight.” Muhammad, 50, is desperate when he reaches the mobile medical team. He came on foot, carrying his feather-light son, Yahya, 4, in his arms. Muhammad has seen other children in his village die from malnutrition and he’s terrified the same fate awaits his son.