"Approximately 7.1 million Americans moved to another state in 2012. That’s over 2.2% of the U.S. population. The United States has a long history of people picking up and moving their families to other parts of the country, in search of better livelihoods. That same spirit of mobility, a willingness to uproot oneself, seems alive and well today based on the visualization of migration patterns above.
The visualization is a circle cut up into arcs, the light-colored pieces along the edge of the circle, each one representing a state. The arcs are connected to each other by links, and each link represents the flow of people between two states."
Via Seth Dixon