What might have caused the helicopter crash that killed Iran's president
![Iranians gather at Valiasr Square in central Tehran on May 20 to mourn the deaths of President Ebrahim Raisi, Foreign Minister Hossein Amir-Abdollahian and several others in a helicopter crash the previous day.](https://media.npr.org/assets/img/2024/05/20/gettyimages-2153319416-297e84be2679ddd1383800f7c54f6318b00ee15d.jpg)
Bad weather may have been a cause of Sunday's crash that killed Ebrahim Raisi. But mechanical issues, possibly exacerbated by a lack of spare parts due to U.S. sanctions, could also be a factor.
(Image credit: Atta Kenare)
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