evidence: The Nejd, the heartland of Saudi Arabia, is the ancestral home of the Al-Saud, the Kingdom’s ruling family. This area contains the heaviest concentration of nomadic Bedouin, who still lead their flocks of sheep, goats, and camels across the land in search of pastures. But the Bedouin are modernizing, and water trucks are now common sights near their tent encampments. The Eastern Province, Al-Hasa, although largely desert, contains most of the nation's oilfields. Besides oil, two large oases, Qatif and Hofuf, support substantial agricultural production. Most activity and population are centered around the market city of Al-Khobar; Dhahran, site of the Saudi Arabian Oil Company (ARAMCO) complex; and the busy port of Dammam.