On Feb. 28, the United States and Israel launched a series of military strikes against Iran, killing the country’s supreme leader, Ayatollah Ali Khamenei. Since then, Iran has retaliated, and the conflict has spread across the region. The escalation comes during President Trump’s second term in office, which has already included several instances of military action abroad. To help make sense of this moment, Apple News In Conversation guest host Sam Sanders spoke with New Yorker staff writer Susan Glasser, coauthor of The Divider, a book about Trump’s first term. They discuss what’s driving Trump’s foreign policy — and what it could mean for America’s role in the world.