It's the population of D.C. in the day and in the night. Does anyone know what that red blob in the bottom left is? I'll give you a hint: it's a single building.
Monday, September 26, 2011
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Daniel Kuehn is a doctoral candidate and adjunct professor in the Economics Department at American University. He has a master's degree in public policy from George Washington University.
http://en.wikipedia.org/wiki/The_Pentagon
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