DUBAI, Oct 1 (Reuters) – Hours after the world expo fair opened in Dubai on Friday, Afghanistan’s exhibition remained closed to visitors in a sign of the challenges facing the country’s new Taliban rulers. But the country’s pavilion, which was organized by the previous Afghan government before it was driven from power by the Taliban last month, remained unfinished and closed to visitors on Friday. A security guard at the building where the pavilion is located said they had not seen any one work there in weeks. The representative referred further comment to the Afghan pavilion “team” but did not say who that was. The Dubai government and the United Arab Emirates foreign ministry did not respond to Reuters queries.