An Iranian policeman stands guard atop a watch tower beside the Afghan border near Zabol, 1,605 kilometers (1,003 miles) southeast of Tehran May 20, 2009. Iran, which shares a 900-km (560-mile) border with Afghanistan, is a conduit for smuggling drugs to the West from its insurgency-ridden neighbour. REUTERS/Caren Firouz (IRAN CRIME LAW POLITICS SOCIETY)