FILE - Tunisian Salafists confront police officers during a demonstration in Tunis, in this Friday, Feb. 17, 2012 file photo. The cradle of the Arab Spring, Tunisia also has a long history of frustrated youth heading off to fight in foreign jihads. Now, according to figures released by the Syrian government, they may make up a large percentage of Arabs who have gone to join the struggle against the regime of Bashar Assad. And that has raised alarm both about radicalization in the Syrian rebel movement, and of rising extremism within newly-democratic Tunisia itself. (AP Photo/Amine Landoulsi, File)