The number of foreign fighters who have joined the Islamic State in Syria and Iraq now exceeds 20,000, up from the 15,000 estimated last October. According to ICSR, nearly a fifth of the fighters come from Western European nations.

The number of foreign fighters who have joined the Islamic State in Syria and Iraq now exceeds 20,000, up from the 15,000 estimated last October. According to ICSR, nearly a fifth of the fighters come from Western European nations.