The Capitol complex was briefly on lockdown following the incident Thursday afternoon.
The Turkish border is teeming with migrants, many of whom have nowhere to live and nowhere else to go.
We're getting ready to interview a group of mayors from around the world. But we need your help!
Why should you need to pay a fee before you're allowed to park a car?
Superfund clean-ups are halted, and that's just the start.
San Francisco and Austin may have figured this out, but places like Muskegon, Michigan, are a better reflection of the obstacles ahead.
In a new video, a Yale sociologist shows how relationships spread risk.
Billions in drug control spending hasn't staunched supply.
From Fort Sumter to Ellis Island, photos are pouring in of America's shuttered national monuments.
A relatively pain-free way to make these schools accountable to their students.
New York's not the only city with a stop-and-frisk program, or a stop-and-frisk problem.
A train tour through China's coal country, where every bit of the shadowy landscape has been pressed into the service of power generation.
And the whole concept of legislating by ridiculous anecdote.
The latest evidence of the political influence of density.
They're highly qualified, and they need jobs. And yet fewer than one percent of all teachers have doctorates.
It'll be used to tear down abandoned houses and build smaller, affordable housing.
Scientists warn of "unequivocal" climate change that is "unprecedented over decades to millennia."
The major report will include updates on everything from how long CO2 hangs out in the atmosphere to dangers posed by sea level rise.
Helping people get high safely is a lot cheaper than treating them for HIV.