Reporting from Beirut -- Iran's leading opposition figure and his wife emerged Tuesday night to pay their respects to the family of a 19-year-old man slain during recent weeks of violence, according to witnesses and reports on news websites. Mir-Hossein Mousavi and his popular wife, Zahra Rahnavard, visited the family of Sohrab Aarabi in Tehran, paying tribute to the teenager whose death and whose mother's desperate weeks-long quest to find her son have emerged as a symbol of the protest movement against President Mahmoud Ahmadinejad.