Hello. This is todays Worldwide Exchange. Im ross westgate. And im kelly evans. Rio tinto shocks the market. The mining giant reveals it will book a 14 impairment charge. And boeing hits more turbulence. This as top rival airbus gets set to report its commercial results within the hour. The biggest retailer in paris talked about sales improving in the Fourth Quarter because of strength in its two biggest hkts. And bank of america and citigroup will report earnings in the u. S. With mortgage lows expected to weigh on results. Hello and welcome to todays Worldwide Exchange. Plenty to get to on the corporate front. Maybe things are getting better. So much corporate thus. Much less of the European Central Bank Crystal Ball action. Well get to all of on those stories. Were going all over the world to bring them to you. Rio tintos ceo steps down ask well ask whether the miners mozambique actions are to blame for his sudden exit. Boeing is set to report 2012 orders. Here in london, well take