Once a year, the United Nations convenes a space where even adversaries must be permitted to speak — and the United States, bound by a 1947 accord, has honored that obligation by granting visas to Iranian leaders for the General Assembly in New York. The decision does not signal warmth between Washington and Tehran, nor does it soften decades of sanctions, proxy tensions, and mutual hostility. It is, rather, a quiet acknowledgment that international order sometimes requires nations to hold open a door they would otherwise prefer to keep shut.