In this Wednesday, May 8, 2013 photo, Jeff Caldwell, 29, a chassis assembly line supervisor, monitors the assembly line at the Chrysler Jefferson North Assembly plant in Detroit.
A driver with FedEx carries a package away from a van in Seattle. A huge increase in online shopping this year has demand for package delivery exceeding capacity this holiday season and stretching the delivery supply chain thin.
Ted S. Warren/AP
An FBI official at the scene of a shooting, Thursday in Miramar, Fla. Four people, including a UPS driver, were killed in the shootout between the armed robbers and police authorities.
A Chicago man has been charged with mail fraud and mail theft after allegedly changing UPS's corporate mailing address to the address of his own apartment. Here, mail is sorted at Chicago's main post office in 2006.
Scott Olson/Getty Images
Rewarding customers when they choose slower shipping options is one way online retailers are reacting to a recent decision by UPS to add a holiday surcharge during peak delivery days.
UPS employees cross the street shortly after a shooting at the company's facility in San Francisco. According to law enforcement, the suspect killed himself with a gunshot to the head.
UPS delivery man Vinny Ambrosino was dressed for the holiday season on Tuesday as he delivered packages in New York City. Not all the things ordered for Christmas got to their destinations on time.