As radical Islamists take control of Syrian border towns, the spill-over is evident in southern Turkey. Small shops cater to radicals, selling black head bands with Koranic slogans. In Killis, on the Turkish border, cafes offer "jihadi tea" for a clientele with long beards and an alarming agenda. Many analysts say Turkey turned a blind eye to international jihadists crossing the border to overthrow the Assad regime. The bill has come due as Washington expresses extreme concern, young Turks join the jihad in Syria, and international extremists flock to the Turkish border on the way to the jihad.