Iranian authorities imposed extensive security measures across Tehran on July 6, including the closure of the capital's airspace, as public funeral ceremonies for the late Supreme Leader Ayatollah Ali Khamenei got underway.

Iran will begin a six-day funeral for Ayatollah Ali Khamenei, as authoritarian leaders gather in Tehran, and questions persist over Mojtaba Khamenei's health.

Iran is commencing extensive six-day funeral ceremonies for Supreme Leader Ali Khamenei, who was killed on February 28. Authorities anticipate millions attending in Tehran, aiming…