1/5: Dangerous cold invades upper Midwest; deadly plane crash in Aspen

As a historic cold snap grips the Midwest, the worst of the cold is affecting Minnesota and North Dakota, where wind chills of 60 below zero have been recorded; and, A small private jet carrying three people crashed as it was attempting to land at the resort town of Aspen, Colo. Investigators say one person died and the other two were injured.