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- Iranian President Ebrahim Raisi died in a helicopter crash on Sunday in foggy conditions.
- An official said the rescue effort was made "extremely difficult" by darkness, dense fog, and rain.
- Kobe Bryant and other officials have died in helicopter and plane crashes after flying in heavy fog.
Flying a helicopter in fog can be a recipe for disaster, with Kobe Bryant and now Iran's president adding to a string of deaths.
Iranian President Ebrahim Raisi and his entourage died after his aircraft crashed Sunday in a remote and mountainous area of northwestern Iran.