President Paul Biya of Cameroon marked 40 years in power Sunday but stayed out of the spotlight as questions swirled about the 89-year-old who is the only leader most of the country's people have ever known.
Biya has not appeared in public since French President Emmanuel Macron visited the Central African nation in July, Decrees and photos of Biya receiving various diplomats are regularly posted on the president's social media accounts.
