Visual Data

Whether it's the racial representativeness of police departments or the accuracy of weather predicting, graphs have the ability to present complicated data in a visually sensible way.  Choose one (or more) of the graphs from this eclectic collection from fivethirtyeight.com and write about it.  What do you find interesting or telling about the graph?  How does the graph communicate information in a way that numbers (tables) can't?