Every few years, NATO rediscovers an old argument. The location and actors change, yet the debate remains remarkably familiar: Should the Alliance concern itself only with defending allied territory, or can it legitimately act when developments beyond its borders threaten its security? Today, that question resurfaces regarding Iran and the Strait of Hormuz . The prospect of NATO safeguarding freedom of navigation prompts predictable objections: Hormuz is not NATO territory, and Iran is not