Federal Express delivers about 13 million packages a day.  Their drivers work hard.

But there are several secrets you might not know about the FedEx fleet.  No, they're not allowed to have cell phones in their trucks.  Not all of them actually work for FedEx.   And what do some of them do when they have to pee?

The great website Mental Floss put together a very interesting piece on the secrets of FedEx drivers.