On the margins of the United Nations General Assembly in New York, American and Iranian officials engaged in their most direct contact in weeks, with mediators working to bridge a chasm between two nations whose standoff over the Strait of Hormuz threatens the arteries of global commerce. Iran arrived with explicit conditions — the lifting of a naval blockade, the release of frozen assets, the end of military pressure — while Washington oscillated between optimism and the language of annihilation. Whether this fragile opening at the world's foremost diplomatic forum can hold long enough to bec