Eric WatkinsOil Diplomacy EditorSaudi Arabia's ability to produce the oil needed to keep markets calm has come under scrutiny lately, a point neatly confirmed by recent analyst reports."As revolution and political transition transform the Middle East and North Africa (MENA) region, markets have become increasingly focused on developments in Saudi Arabia," said a report by Nomura Securities.Traders are searching for any potential threats to Saudi Arabia's oil production capacity—particularly given its use in making up for shortfalls elsewhere—and monitoring its evolving role in regional economic and political trends.That view was underscored by another report from a t...