Iran appears to be ramping back up its naval harassment activities in order to gain leverage in negotiations with the West and display strength at home. Such aggressive behavior, however, risks upending those talks altogether by threatening regional security. A hijacking and deadly attack within days of each other near the strategic Strait of Hormuz reflects a higher risk tolerance akin to previous periods of frequent Iranian naval harassment. On Aug. 3, hijackers seized the Panama-flagged Asphalt Princess tanker while it was transiting the Gulf of Oman and demanded that the vessel set sail for Iran. The hijacking of the vessel, which is owned by a Dubai-based firm, comes only days after a suspected Iranian unmanned aerial vehicle (UAV) killed two sailors on board the Israeli-linked Mercer Street tanker. While the details of its involvement in both incidents may never be confirmed, Tehran is likely the culprit based on past...