By bne Tehran bureau Iran and Azerbaijan on Sunday, May 19, opened a hydroelectric dam on their border, with officials calling the megaproject a symbol of “long-term cooperation” and “friendship and amity” between the two nations despite political disagreements in recent years, IRNA reported. The Qiz Qalasi (Maiden Tower) Dam, built on the Aras River along the Iran-Azerbaijan border, was brought online by Iranian President Ebrahim Raisi and his Azeri counterpart Ilham Aliyev hours before the helicopter crash and subsequent search operation. The two leaders walked on the 834-metre dam crest bef…