In the the final Trump-Clinton presidential debate, Hillary Clinton said:
But here's the deal. The bottom line on nuclear weapons is that when the president gives the order, it must be followed. There's about four minutes between the order being given and the people responsible for launching nuclear weapons to do so. And that's why 10 people who have had that awesome responsibility have come out and, in an unprecedented way, said they would not trust Donald Trump with the nuclear codes or to have his finger on the nuclear button.
Some people, such as commenters on this Reddit forum are concerned that that information is classified, and should not have been publicized.
Is that information classified by the US military?