Senegal has long been an entry point into Africa. Situated at the far west end of the continent on the Atlantic coast, the country has drawn foreign powers -- from Arab traders to European empires -- to its shores for centuries. More recently, Senegal has maintained a quiet influence in West Africa and in the Francophone world, despite its relative lack of natural resources, economic development and population size. The secret to its enduring importance lies in its geography and relative political stability....