Snow ploughs battle blizzards on roads and runways in Oklahoma

A severe winter storm is impacting over 200 million Americans, bringing heavy snow and freezing temperatures across a wide swath of the United States. The National Weather Service forecasts that some regions, stretching from Colorado to West Virginia and up the East Coast, could receive over a foot of snow. The storm has led to the cancellation of more than 10,000 US flights over the weekend. In Oklahoma, snow ploughs are working to clear roads and airport runways. The purpose of these efforts is to maintain transportation infrastructure during the blizzard conditions.