Kazakh President Nursultan Nazarbayev said he may extend the longest reign of any former Soviet leader by running for a fifth term in 2016. "There definitely will be a transition of power -- there's nothing frozen, it will be changed," Nazarbayev, 73, said in an interview in the presidential palace in the Kazakh capital, Astana last week. "I was elected until December 2016. The time will come when we'll talk about it."