India, March 2 -- 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 US and Israeli strikes on Iran.

US 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 media said early Sunday that the 86-year-old leader had died without elaborating on a cause.

Israeli officials previously told The Associated Press on condition of anonymity that Khamenei was dead. And Israeli Prime Minister Benjamin Netany...