Achl Arc News Today

>> no signs of aircraft debris have been found. the area can now be discounted as the final resting place for flight 370. >> reporter: that means its back to focusing on a larger area, hundreds of miles elsewhere along the inmarsat achl arc. this, one day after michael dean, deputy director of the ocean engineering, said in an exclusive interview, the pings were likely not from flight 370s black boxes. >> our best theory at this point was it was likely some sound produced from the ship. >> its n...