Today's Wall Street Journal states that there were 4 pilots in to cockpit at the time of the incident, the two flying, a 'relief' pilot, and a fourth they 'could not confirm was working'.
This reminds me of the C5 incident at McGuire AirForce base several years ago where there were multiple pilots in the cockpit and not one of them noticed that they shut down the wrong engine resulting in an inpact about a mile short of the runway.
Does everyone think that someone else is watching the ship and they just tune out?