In Yemen, the World Health Organization warns the world’s worst humanitarian crisis is growing more severe, with about 10,000 new cases of cholera appearing each week. The WHO says the water-borne disease is spreading rapidly since much of Yemen’s sanitation and medical infrastructure has been destroyed by a U.S.-backed, Saudi-led bombing campaign. In August, U.N. human rights experts accused the Saudi-led coalition of committing possible war crimes, including the bombing and shelling of schools, hospitals and markets.