Ayed: Which state nuclear program poses the greatest threat to global security today? By: Nahlah Ayed , / February 19, 2013 By: Nahlah Ayed London correspondent for CBC News The National Ayed: What was the most significant development in international affairs this year? Ayed: Are criticisms of the preliminary nuclear accord with Iran prescient or paranoid? Ayed: Are global talks on climate change useful? All of them.