In this Sunday, June 9, 2013 photo, militants, who claimed that they are ready depart to fight the war in Syria, perform martial art techniques during a show of force in Solo, Central Java, Indonesia. While security agencies in Europe and beyond are worried about militants returning from Syria, Indonesia knows only too well how foreign battlefields, training opportunities and contact with al-Qaida can lead to deadly results. Indonesian anti-terror officials estimated there were around 50 Indonesian militants fighting against the regime of Bashar Assad in Syria and the number is expected to grow. (AP Photo)