HOUSTON (Reuters) - BP Plc's chief executive said a difficult deep-sea operation to plug a gushing oil well was proceeding as planned on Wednesday and the next 24 hours will determine the energy giant's success in stanching the leak deep on the Gulf of Mexico floor.
BP remained cautious about the outcome of the much anticipated "top kill" procedure, as did President Barack Obama, whose credibility stands to suffer if one of the country's worst environmental catastrophes does not end soon.
