Merchant vessels are taking weeks to deliver vital food supplies to Yemen as Saudi-led coalition warships search for arms bound for Iran-allied Houthi fighters and heavy fighting disrupts shipments in a worsening humanitarian crisis. The conflict has hurt imports to Yemen, where about 20 million people or 80 percent of the population, are estimated to be going hungry. The Arabian peninsula's poorest country, Yemen imports more than 90 percent of its food, including most of its wheat and all its rice - most of it by sea. It faces increasing problems as many shipping companies have pulled out and those...