Here is a delightful interactive graphic created by Nathan Yau @ FlowingData
Make sure to click on the map to watch as Walmarts spread across the US

Popularity: 2% [?]
Making the “Invisible Hand” Visible
Here is a delightful interactive graphic created by Nathan Yau @ FlowingData
Make sure to click on the map to watch as Walmarts spread across the US

Popularity: 2% [?]
Created by Nathan Yau @ FlowingData
Click on map to view the Interactive Flash version

Popularity: 4% [?]