Ayatollah Seyyed Ali Hosseini Khamenei, Iran’s Supreme Leader for more than three decades, was killed in a major attack carried out by Israel and the United States, Iranian state media confirmed early Sunday, plunging the future of the Islamic Republic into uncertainty and raising fears of wider regional instability. The announcement came hours after U.S. President Donald Trump publicly declared Khamenei’s death, saying it offered Iranians their “greatest chance” to “take back” their country.” An anchor on Iranian state television, visibly emotional, read a statement in Farsi confirming the 86-year-old cleric’s death. “After a lifetime of Hosseini struggle, unceasing and untiring, with a lofty and celestial spirit like the steadfast mountain of (the Islamic) guardianship, the compassion...