Millions expected at nearly weeklong ceremonies across Iran and Iraq as the regime casts its slain supreme leader as a Shiite martyr, projects unity after months of turmoil and vows revenge against Israel and the United States

Ceremonies are planned in Tehran, Qom, Najaf, Karbala and Mashhad, with officials expecting foreign leaders, hundreds of journalists and millions of mourners

By Parisa Hafezi and Angus McDowallDUBAI, July 2 - Iran's ruling clerics are preparing days of mass funeral rites for Ayatollah Ali Khamenei as a show of public devotion to the…