Just to remind everybody where this came from AF447 crashed in the Atlantic Ocean RIO to PAR flight because two copilots with captain taking required rest was in back sleeping. They encountered precipitation and pitot tubes froze up causing no airspeed indication so autopilot disconnected so PF pulled up 15 degrees at 35,000 ft and of course stalled. The FO assisting did nothing but request the captain to return to cockpit. By then they were in a deep stall and when the captain arrived it was too late so they crashed and everybody died. All that was necessary was one pilot who could hand fly but he was sleeping. I think this our next generation of pilots.