Nuclear capability wouldn't necessarily rule out this kind of a decapitation strike, it's just that it's very hard to imagine this kind of an operation actually being successful in any nuclear-capable country.
The US couldn't just fly a bunch of helicopters to Pyongyang or Tehran and do the same within 30 minutes. Most likely every single one of those helicopters would end up being shot down.
The US couldn't just fly a bunch of helicopters to Pyongyang or Tehran and do the same within 30 minutes. Most likely every single one of those helicopters would end up being shot down.