A look at how much the U.S. has spent through Homeland Security since 9/11 and what the government spends on preventing deaths through public health
Ten years later, what exactly residents and rescue workers were exposed to remains at least a partial mystery
Municipalities worldwide are introducing a host of creative solutions to reduce energy consumption, water use, waste and emissions, while also making it easier for people to get around...
A tour of the world's tallest buildings, including those under construction.
The people of cities such as Lagos are forging the world's urban futuremessily, scrappily, but with do-it-yourself energy and entrepreneurial verve
Data from hundreds of U.S. cities show that, on average, larger cities produce more wealth and innovation per capita than smaller ones do
Two decades of New York Police Department crime statistics mapped precinct by precinct
A visual history of the space shuttle program, spanning nearly four decades
New data illustrates how deeply AIDS has taken root the U.S. South, where many patients are poorer and more marginalized than ever before