Cameroon's President, Paul Biya is marking 35 years in office today, turning him one of Africa's longest-serving leaders.  Biya first took office in 1982, when the country had a one party system.

Biya is part of a selected group of African leaders, who have ruled their countries for more than 30 years, with only Robert Mugabe in Zimbabwe and Obian Ngema in Equatorial Guinea in power longer.

The 84-year-old, who critics accuse of being authoritarian, is expected to stand again next year.