RPT-Where is Japan's nuclear power CEO?(Repeats with no changes) TOKYO, March 20 (Reuters) - The head of the Japanese power company at the centre of one of the world’s worst nuclear disasters has all but vanished from the public eye. And many Japanese, on a knife edge waiting to see if the nuclear power plant and radiation leaks can be brought under control, are beginning to ask where he is and questioning how much he is in control of
