Winter Storm Fern swarmed much of the continental U.S. Sunday, with heavy snowfall and freezing temperatures leaving hundreds of thousands without power and throwing a wrench in freight and delivery operations across the Midwestern, Southern and Northeastern parts of the country. Major logistics operators including UPS, FedEx and the U.S. Postal Service (USPS) all issued delivery delay warnings ahead of the snowfall, with UPS forced to suspend operations at its Worldport air hub in Louisville, Ky. Sunday. ...