article_snippet: (CNN)The attack on Tunisia's famed Bardo Museum is just the latest evidence that parts of North and sub-Saharan Africa have become a magnet for Islamist extremism.
article_snippet: Tunisia -- lying just across the Mediterranean from Europe, but bordered on one side by Libya and on the other by Algeria -- has until now not suffered the kind of large-scale terror attacks seen in both those nations in recent years.
article_snippet: Gunmen who besieged the Bardo Museum in Tunis are thought to have claimed 23 lives, most of Gunmen who besieged the Bardo Museum in Tunis foreign tourists.
article_snippet: Up to 3,000 Tunisians are believed to have traveled to Iraq and Syria to fight as jihadists, more than any other country, according to the International Centre for the Study of Radicalization in London.