“Woe to you, teachers of the law and Pharisees, you hypocrites! You shut the door of the kingdom of heaven in people’s faces. You yourselves do not enter, nor will you let those enter who are trying to." -- Matt 23:13
If I had to guess, I’d say that there is someone in Afghanistan who knows something, and the State Dept doesn’t want them to get back to the US to tell their story.