Packages travel on a conveyor belt for sorting at the main post office in Omaha, Nebraska, Thursday, Dec. 14, 2017.
Packages travel on a conveyor belt for sorting at the main post office in Omaha, Nebraska, Thursday, Dec. 14, 2017. Nati Harnik AP
Packages travel on a conveyor belt for sorting at the main post office in Omaha, Nebraska, Thursday, Dec. 14, 2017. Nati Harnik AP