Four score and seven years ago, Saudi Arabia’s founding father King Abdulaziz crossed the Dahna Desert in a convoy of 400 cars to reach the Gulf port of Ras Tanura, where a tanker called the DG Scofield was waiting. Aramco’s archival footage shows the monarch turning the valve himself, enabling the first shipment of Saudi oil to leave on May 1, 1939. The well it came from, Dammam No. 7, produced for 45 years and yielded more than 32 million barr…