The second son of the late supreme leader keeps a low profile. But he's long been viewed as wielding his power behind the scenes, from crushing dissent to influencing presidential elections. Iran's killed supreme leader will be replaced by one of his sons, Mojtaba Khamenei, a mid-ranking cleric who has until now wielded his power exclusively behind the scenes. Iran's Assembly of Experts — the clerical body tasked with selecting the count... [5680 chars]