U.S. officials scrambled after an Israeli strike killed Hezbollah leader Hasan Nasrallah, anticipating potential Iranian retaliation. President Biden called Nasrallah’s death “a measure of justice” for his role in killing Americans and others. The strike raised concerns about U.S.-Israel communication, as U.S. officials were unaware of the planned airstrike and a prior Israeli operation. Miscommunication persisted, with conflicting reports about a supposed 21-day cease-fire agreement between Israel and Hezbollah, which never materialized.