A hidden power struggle in Iran's government is sabotaging peace talks with the U.S., as hardline revolutionaries demand revenge for their slain leader while pragmatists seek to end the war. New York Times correspondents reveal how a weakened successor supreme leader has lost control over factions determined to restart military conflict. Hardline Revolutionary Guards elements attacked U.S. ships without authorization from Iran's government, suggesting they're operating independently to sabotage peace negotiations and restart the war.