SAN`A, Yemen -- Armed tribesmen kidnapped four French tourists in southeastern Yemen on Sunday, the latest in a series of such abductions that have embarrassed the Yemeni government. The four were seized as they were heading to the southern port city of Aden, said Denis Douveneau, the deputy chief of mission at the French Embassy. "We received a phone call from one of the hostages and he told us they were being treated well and were healthy, physically and mentally," the French envoy said. He said French diplomats were in touch with Yemeni authorities "and we hope we can resolve...