Russia accuses America of ‘pre-planned and unprovoked act of armed aggression’ against Iran

How long will it last? Will it grow? What will the conflict and the reported death of Iran’s Supreme Leader Ayatollah Ali Khamenei mean to us, and to global security overall? Those questions echoed across the Middle East and the planet Saturday as world leaders reacted warily to U.S. and Israeli strikes on Iran.

U.S. President Donald Trump said on social media that Khamenei was dead, calling it “the single greatest chance for the Iranian people to take back their Country.” Iranian state...