SOME 2000 demonstrators descended on Thursday on the ruins of a pharmaceutical plant in the Sudanese capital Khartoum targetted by United States missiles a year ago, demanding justice to be served against the US. The crowd of mainly boys and girls brought to the site by school buses chanted anti-US slogans such as “Down, Down US” and vowing to rebuild whatever the United States destroys. Sudan has announced that two new pharmaceutical factories — one private and the other partly owned by the government — will be opened on Friday to mark the anniversary. The US said the factory had military applications and accused Sudan of links with outlawed Saudi multi-millionaire Osama bin Laden, whom it blames for the embassy attacks.