Why West Africa is now the world's terrorism hotspot
Summary
Jihadist attacks surge in Burkina Faso, Mali and Niger
Violence driving spike in migration from region to Europe
Expelled by juntas, West has few options to respond
U.S. general: jihadi groups aspire to strike U.S. targets
DAKAR, Sept 24 (Reuters) - Having slipped undetected into Mali's capital weeks ago, the jihadis struck just before dawn prayers. …