> If the asteroid has a 85% chance of destroying Iran's military capability I strongly doubt that Iran's military capability can be destroyed by a single untar

> If the asteroid has a 85% chance of destroying Iran's military capability I strongly doubt that Iran's military capability can be destroyed by a single untargeted 8 megatonne airburst. China's _obviously_ cannot. The absolute worst case here is it goes off directly over a city (though, naturally, this is extremely unlikely, most of the world's surface not being covered in city). It's not a country-ending thing.