China raised its emergency warning to its second highest level and canceled more than 60% of the flights to Beijing on Wednesday amid a new coronavirus outbreak in the capital — a sharp pullback for the nation that declared victory over the virus in March and a warning for the rest of the world about how tenacious this virus really is. …. European nations, which embarked on a widescale reopening this week, looked on with trepidation as the Americas struggled mightily to contain the first wave of the pandemic and Asian nations like China and South Korea reported new outbreaks, giving rise to fears of a second wave. Chinese officials described the situation in Beijing as “extremely grave.”