By T. CHRISTIAN MILLER Afghanistan’s opium crop this year is set to break all previous records, surging past even the highest levels cultivated during the Taliban regime, top American and international counternarcotics officials said. At the same time, U.N. and U.S. officials are increasingly worried by signs of a nascent drug trade developing in Iraq, where smugglers are taking advantage of the continuing chaos and unguarded borders. Instability in the wake of the U.S.-led (...)