PITTSBURGH — The critically injured sole survivor of the West Virginia coal mine explosion showed dramatic improvement Saturday and was stable enough that he was flown back to a hospital closer to his home, doctors said. Randal McCloy Jr. has been in a medically induced coma to allow his brain time to heal, but when the medication is eased, his eyes flicker and he bites down on his breathing tube, showing he is "awake underneath our coma," said Dr. Richard Shannon of Allegheny General Hospital in Pittsburgh. "We think that he is clinically stable," Shannon said Saturday afternoon. "He is...