Mojtaba Khamenei, Iran's new Supreme Leader as of July 11, has vowed revenge for his father's killing and escalated tensions with the US, including suspending an interim deal on July 18. His absence from the Ayatollah's funeral on July 5 suggests he may be wounded or in hiding. Watch for his public appearances and any shifts in Iran's military doctrine, as the regime appears to be preparing for a "long war" as of August 13.