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AP Officials have confirmed a truck collided with the trusses.
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Postcard
What It Looks Like to Clean the Top of the World
Wild shots of window washers.
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A Power Outage, As Seen From Space
Last week's massive storm left a million people without power around Washington. Here's what it looked like at the height of darkness.
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Videos
Advice to Aspirational Mega-Cities
They are our future. Here's what we need to do to make sure America's regions stay on track.
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Olympics 2012
London's Insane Olympics Hotel Rates Now Less Insane
As the Games approach and reality sets in for hoteliers, procrastinating tourists are starting to be rewarded.
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What Critics Get Wrong About the Creative Class and Economic Development
The Fall of the Creative Class? Not so fast.
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The Secret to London's Tech Boom
A new report makes the case against a top-down approach to developing high-tech districts.
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Urban Wonk
Cities That Wouldn't Exist Without Air Conditioning
The invention of the air conditioner is still shaping the future growth of global metros.
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Why Cities Are Growing Faster Than Suburbs
It's not just millennials - families and baby boomers are also leaving their suburban homes.
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In Cleveland, Green Goals Are Transformed Into Community Development
Worker-owned cooperatives are leveraging the city's the biggest institutions to create jobs in the impoverished neighborhoods right next door.
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Charts
The 440 Cities Driving Global Growth
Cities in emerging economies will play a huge role in increasing global GDP between now and 2025.
