New York Times: The accident at Japans Fukushima Daiichi plant in 2011 alerted the American nuclear industry and its regulators to the possibility that operators at plants with more than one reactor might have to deal with more than one meltdown at a time in a flood, earthquake or other catastrophe. Officials are now working to assure that they could master that situation. But documents uncovered by a group that is critical of nuclear safety show that a high-level safety analyst at the Nuclear Regulatory Commission...