Washington on Mideast matters; 30,000 Americans work in the arid kingdom on economic and military projects; 10,000 young Saudis study at universities in the United States. Even so, the Saudis remain a bit of a mystery, with their Islamic conservatism, their Bedouin ways, their quiet use of dollar di- plomacy in Africa and the Arab states. Here William Rugh re- views the kingdom's epic past and uncertain future; John Duke Anthony examines Saudi Arabia's cautious foreign policy; and David Long looks...