Access is everything to reporters. We want people to talk to us, to share confidences and documents, to point us to others who will do the same. But there's a price: Don't burn your sources ... which can mean ignoring a story that will prompt the subject to slam the door (figuratively or actually) in a reporter's face. That might be one reason it took Rolling Stone to reveal the contempt for the president and other civilians to whom U.S. military officials in Afghanistan report.