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We Remember: September 11, Eleven Years Later

Private moments at public gatherings in New York and Washington.

Citywide Indoor Navigation Is Closer Than You Think

A new app launching in Seoul this fall will allow users to navigate from a street corner down into the subway and even to a particular shop or café in an underground mall.

How to Create More Latino-Run Businesses

Latino immigrants open fewer small businesses than other groups. Here's how we can close the gap.

You Can Literally Hear What Pollution Sounds Like

A team of scientists assigned tones to different air pollutants. Here are the results.

Mementos of NYC's 'Missing Limb'

Long-time city photographer Steven Siegel recalls one of his favorite subjects, the World Trade Center.

How Climate Change Could Make Summer Crime Waves Worse

One researcher predicts we could see as many as 30,000 more U.S. homicides over the next 90 years thanks to rising temperatures.

Foreclosure Crisis Opens and Closes a Treasure Trove of Parks

With one of the nation's highest foreclosure rates, Atlanta thought it had found the perfect opportunity to build more parks.

Talent Beats Trade in Economic Development

Turns out human capital is vastly more important than trade when it comes to generating regional growth.

Disappointing Contest of the Day: America's Transportation Award

Guess what kinds of projects the American Association of State Highway and Transportation Officials decided to honor this year?

Boosting Ridership by Replacing Buses With Rail

How L.A.'s rail system has put more riders on transit.

When Building Demolitions Go Wrong

Cough, cough.

The 'Vegetal' Cities of Luc Schuiten: A Sustainability Fantasy

The visionary architect imagines metropolises built like vast orchards.

Packing Up: Where People Are Moving In and Out

Large, expensive U.S. metros were more likely to lose residents this summer.

A Diary of Camping in New York City

One couple's quest to find serenity in "the wilderness" of Staten Island.

Giant Head Sees All on the Beaches of Rio

Great public art, or the setup for a hilarious jet-ski accident? You be the judge.

For the Love of Concrete

A new book aims to repair the reputation of the much-maligned composite.

Remembering a Pioneer of American Architecture Photography

Jack Boucher spent his life preserving historic buildings with his camera.

Concrete Ideas for Promoting Walkability

There's a wealth of resources available to communities looking for a place to start.

Mapping L.A.'s Endangered Pot Shops

Facing a citywide ban, dispensaries prove to be far less plentiful than feared.