Keith's note: In case you haven't noticed Charlie Bolden has been invisible for several weeks after the Muslim outrech media storm. No one in the media has interviewed him. He hasn't been quoted. He's just been, well, invisible. He surfaced yesterday at a stealth visit to GSFC. NASA only admitted this via Twitter a few minutes ago. No doubt he will disappear again. You can tell if he is arriving (or departing) stealthily if you hear this noise. This way he can avoid the media more easily.