From Forbes magazine:

More than 10 million Americans moved from one county to another during 2008. This map visualizes those moves. Click on any county to see comings and goings: black lines indicate net inward movement, red lines net outward movement.

We won’t state the obvious, except to say that these migration patterns underscore the need to get serious, real serious, about becoming a city known for its talent, opportunity, and sense of place.

To see the map, click here.