By bne Tehran bureau Iranian Supreme Leader Ali Khamenei has announced five days of mourning and the closure of government and businesses following the death of Iranian President Ebrahim Raisi and Foreign Minister Hossein Amir-Abdollahian on May 19 close to the Azerbaijan border. The helicopter, which crashed carrying the six top officials into the foothills between Iran and Azerbaijan, took several hours to find the wreckage due to low visibility from fog and rain, which stretched into the night. Mohammad Mokhber is now acting President following confirmation from Ayatollah Khamenei and will …