Shipping containers are unloaded from inside a Boeing Co. 747 during United Parcel Service Inc. (UPS) Worldport overnight shipping operations at Louisville International Airport in Louisville, Kentucky, U.S., on Thursday, Aug. 22, 2013. Founded 106 years ago as a bicycle messenger service, UPS now handles 16.3 million packages and documents per day and is considered an economic bellwether because of the diverse items it delivers such as industrial parts, health-care products and financial paperwork. Photographer: Luke Sharrett/Bloomberg via Getty Images