Workers prepare outgoing shipments at an Amazon Fulfillment Center, ahead

Workers prepare outgoing shipments at an Amazon Fulfillment Center, ahead

Workers prepare outgoing shipments at an Amazon Fulfillment Center, ahead of the Christmas rush, in Tracy, California

Workers prepare outgoing shipments at an Amazon Fulfillment Center, ahead of the Christmas rush, in Tracy, California, November 30, 2014. REUTERS/Noah Berger