Record-low temperatures caused by the Polar Vortex have forced schools across the country to close this week. Weather-related school cancellations tend to raise anxieties about whether we're a nation of wimps. During President Obama's first winter in Washington, he complained when his daughters' school closed for bad weather: "We're going to have to apply some flinty Chicago toughness to this town." In response to this latest round of school closings, a Virginia mom sighed, "Hasn’t anyone heard of gloves, scarf and a hat when it’s cold?? Just bundle up—people do it all over the world. We are such wimps to cancel school."