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At the age of 31, Hassan Nasrallah became the Secretary-General of Hezbollah. Hezbollah is a Shia Muslim organization in Lebanon that has been involved in a number of conflicts in the Middle East, including the Lebanese Civil War, the Israeli-Lebanese War, and the Syrian Civil War. Nasrallah has been a controversial figure, with some people praising him for his leadership and others condemning him for his involvement in violence.