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Acknowledgments

Noriaki Okada (an intern at the NYTimes R&D Lab) contributed a large part of the visualization code and research for this chapter. His work can be found at http://okada.imrf.or.jp. We would also like to thank Michael Kramer, Ted "Chevy's" Roden, and Dick Lipton for their unwavering support on this project.



[61] The two large circles are over Dallas, Texas, and Waterloo, Ontario. Both of these cities are mobile hubs (e.g., Waterloo is BlackBerry/RIM headquarters) and a lot of mobile traffic is proxied through Dallas and Waterloo before arriving at our servers.


  

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