Sara Johnson
Sara Johnson is a fellow at The Atlantic Cities.
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Maps
Map of the Day: Pollution in California
A new interactive map ranks California zip codes based on factors including air quality, pesticide use, groundwater, and traffic density.
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Postcard
Meanwhile, in West, Texas: An Entire Town Must Dig Out From Rubble
Let's not forget about the victims of this week's other major explosion.
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Photos
Scenes From Inside a City on Lockdown
Boston area residents are holding their breath.
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Charts
Stark Stat of the Day: 47,000 Pedestrians Were Killed Between 2001 and 2010
Nearly 70 percent of those fatalities were men; people over 75 were also at higher risk of getting hit.
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Videos
The Chicago River Is Now Running in the Opposite Direction
The river will flow temporarily into Lake Michigan, where it'll dump millions of gallons of raw sewage.
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Real-Time Transit App of the Day: A Ballet of Buses in San Francisco
The SF Live Bus app adds a bit of whimsy to the highly practical world of transit arrival data.
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Maps
The 71 Countries Targeted in Boston
Participants in the 2013 Boston Marathon hailed from across the globe.
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An 'Eerie' Stillness Lingers in Boston
Locals on social media report a distinct lack of chaos, "just a feeling that everyone is focused."
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Amazing Bathroom Fixture of the Day: The Street Map Sink
Haven't you always wanted to brush your teeth over the streets of London?
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At Least We Have a LEGO Version of the Berlin Airport
A scale model of the troubled airport project was completed before the original.
