We live in complicated, dangerous times. Present and future presidents need to know if North Korea's nascent nuclear capability is a genuine threat to the West, if biochemical weapons are likely to be developed by terrorists, if there are viable alternatives to fossil fuels that should be nurtured and supported by the government, if private companies should be allowed to lead the way on space exploration, and what the actual facts are about the worsening threats from climate change.This is "must-have" information for all presidents—and citizens—of the twenty-first century. Winner of the 2009 Northern California Book Award for General Nonfiction.