There are laws and there are American interests that tend to have precedence. It's about risk assessment - how much of a fallout can be expected. In case of Rus

There are laws and there are American interests that tend to have precedence. It's about risk assessment - how much of a fallout can be expected. In case of Russia, it's likely to be substantial, so the US don't intervene. If you talk about "colonial" South America - few people will care. A presidential plane can be grounded en route and searched. And you talk about safety of a former NSA contractor here.