What could President Raisi's death mean for stability in Iran and beyond? Expert Q&A

A helicopter carrying Iranian president Ebrahim Raisi, the country's foreign minister and other officials crashed in the mountainous north-west reaches of Iran on Sunday May 19, sparking a rescue operation in thick fog and driving rain. On Monday, search and rescue teams reached the crash site and "found no signs of the helicopter's occupants being alive".

The death of Raisi and his foreign minister