DOUALA, Cameroon (AP) — Some cities in Cameroon were deserted Tuesday after the main opposition leader asked citizens to stay at home to protest the recent election win of 92-year-old President Paul Biya . The three-day lockdown, which began Monday, was mainly in key opposition strongholds including the economic hub of Douala and in northern cities like Maroua and Garoua, where deadly protests have taken place in recent days. There was partial compliance in the capital of Yaoundé on Tuesday as