ABOARD THE USS LABOON IN THE RED SEA (AP) — The U.S. Navy prepared for decades to potentially fight the Soviet Union, then later Russia and China, on the world’s waterways. But instead of a global power, the Navy finds itself locked in combat with a shadowy, Iran-backed rebel group based in Yemen. The U.S.-led campaign against the Houthi rebels, overshadowed by the Israel-Hamas war in the Gaza Strip, has turned into the most intense running sea battle the Navy has faced since World War II,...