very important. i need you to get in touch with me as soon as you return from your deployment here in afghanistan. reporter: an internal investigation by the defense department into able danger concluded there was no evidence to support shaffer s claim. we were able to obtain an unredacted copy of the inspectors report. through that we were able to identify witnesses who back up shaffer s statements, megyn. megyn: you obtained, catherine a letter that you wanted us to know about. what is in the letter. reporter: this is a letter that was sent by the defense intelligence agency or dia to the army saying that they had objections to the book and that they wanted to block the book on those grounds. it reads in part i have also been informed that united states special command the intelligence agency and the national security agency has determined that the manuscript contains classified information concerning their activities. in this particular case a spokesman for the dia says that the