The United States military unleashed a wave of attacks targeting radar sites operated by Yemen’s Houthi rebels over their assaults on shipping in the crucial Red Sea corridor, authorities said Saturday, after one merchant sailor went missing following an earlier Houthi strike on a ship. The attacks come as the U.S. Navy faces the most intense combat its seen since World War II in trying to counter the Houthi campaign — attacks the rebels say are meant to halt Israel’s war on Gaza. U.S. strikes destroyed seven radars within Houthi-controlled territory, the military’s Central Command said. It di…