The Kenyan capital of Nairobi is still coming to terms with last month's shocking act of terrorism, a hotel attack which left 21 people dead. The investigation into that bloodshed has taken police to the city of Mombasa, where a string of arrests have been made. Mombasa has long been viewed as a breeding ground for regional terrorism. It's a problem that authorities and civil society groups are now determined to tackle. Our correspondents report.
