NEW: Iran launched two ballistic missiles targeting the US-UK base at Diego Garcia in the Indian Ocean on March 21, marking the furthest ever attempted Iranian missile strike. The attack demonstrated that Iranian missiles can reach beyond the 2,000-kilometer limit that the regime has long claimed to have self-imposed. One missile failed inflight, and the United States intercepted the other. Other Key Takeaways: The Islamic Revolutionary Guards Corps (IRGC) has reportedly expanded its influence over regime decision-making amid a growing power vacuum caused by leadership losses and Supreme Leader Mojtaba Khamenei’s apparent inability to exercise full authority. Some of the officials who have likely expanded their influence are among the most aggressive and repressive elements within the IRGC. The United States Treasury Department issued a short-term waiver on March 20, permitting the sale of Iranian oil already in transit. The waiver does not allow for new purchases of oil. The combined force continued to degrade Iran’s missile production capabilities. The IDF struck at least five missile production sites in Tehran.