They've been talking about de-dolarization every day for 20 years. They flew a helicopter through the mountains in the fog. And since it's Iran I'm guessing it was either some old soviet junker or a western chopper that hasn't been properly maintained since the Reagan administration. If it was an assassination, they sure made plausible deniability a fucking cake walk.

Edit: Word on the internet is that it was a Bell 212 purchased before the islamic revolution in 1979, making it at least 45 years old. Helicopters do not last that long. If you're following the rules in America, the airframe has a fixed number of flight hours, but also a fixed number of non-flight hours. It just depreciates continuously until it is deemed unsafe to fly. The safety guidelines are written in blood and they just added another page.