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Steven Koonin, undersecretary for science at the Department of Energy under President Obama, argued that the science behind climate change is not settled and a misunderstanding of the scienc…

Steven Koonin, undersecretary for science at the Department of Energy during the Obama administration, argued that the science behind climate change is not settled and said that a misunderst…

Scientists testified about the threats of nuclear terrorism. Among the topics they addressed were information and technology available to potential terrorists, methods of delivery, control o…