Pittsburgh man at helm in London Gazing at scenes of carnage on his television screen yesterday morning, Brother Gerald Molyneaux said his first chill of fear was for his friend and former student, Tim O'Toole. Molyneaux knew that O'Toole, a Pittsburgh native who now heads London's Underground subway, rides his system's trains to work each day. "I was scared, really scared,'' he said. But after a relative alerted him that O'Toole had appeared unharmed in news reports from London, Molyneaux said the relief that swept through him was not just for O'Toole, but for millions of Londoners who rely on...