World's only floating postal code

The end-of-year holiday period is a busy time for postal services across the world.

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    The end-of-year holiday period is a busy time for postal services across the world.

    People send parcels and cards to loved ones, but those deliveries are easier to make in some areas than others.

    Al Jazeera's John Hendren went to Detroit to find out about the challenges faced by of one of the more unique postal services in the US.


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