MAHMUDIYA, Iraq, Sept 5 (AFP) - An Iraqi nuclear scientist has been assassinated in the Sunni Muslim insurgent bastion of Mahmudiya, south of Baghdad, his brother told AFP Sunday. Mohammed Toki Hussein al-Talakani, who had practised nuclear physics since 1984, was shot dead on Saturday as he was driving in Mahmudiya, Alaa Toki Hussein said. The 40-year-old scientist lived in the small town of Al-Kifl, some 100 kilometres (60 miles) south of the capital. Another man was killed in the town on Sunday during clashes between insurgents and Iraqi forces, while a woman was also wounded, the head of the...