We may take the mail for granted, but a lot of effort goes into it just getting to us. Who makes the trucks the USPS uses and where are they made?

The classic U.S. Postal Service truck, the instantly recognizable Grumman LLV (Long-Life Vehicle), is set to be phased out by a newcomer to mail delivery, the Next-Generation Delivery Vehicle (NGDV).

The lack of civilian mail trucks on the road really comes down to the simple fact that the USPS doesn't sell its trucks when they're retired. Simple as that. Of course, that begs the question of why ...