That is an interesting statement.
Everyone else talking about it has said the opposite. I would like to see the whole quote...I would bet it's from the Armed Services Committee hearing on the 19th. Unfortunately, transcripts of Senate hearings seem to be few and far between.
Given that prisoners are interviewing the media, and that photos are everywhere, I don't see what's left to hide as far as the actual identities of these guys and reasons for confinement are concerned.