Summary: A suicide attacker with a bomb in his turban posed as a Taliban peace envoy and assassinated former Afghan president Burhanuddin Rabbani who for the past year headed a government council seeking a political settlement with the insurgents. … One-year retrospective: One year ago today, on September 20, 2010, Aubrey Immelman featured a discussion by Gen. Colin Powell on foreign policy regarding Afghanistan with David Gregory on NBC’s Meet the Press.