Violent clashes between Kurds and security forces in Turkey over the past week have jolted memories here back to an old conflict that remains a dangerous barrier on the nation’s path toward greater prosperity and democracy. After a decade of calm, at least 15 people have been killed in protests in recent days, most in the guerrilla battleground of the Kurdish southeast, but some in cosmopolitan Istanbul. Among the dead were a 6-year-old boy and a 78-year-old man, Halit Sogut, whose relatives asked on Tuesday how such violence was still possible in a nation that considered its rightful place to be as a member of the European Union. Full Story