All transit has been suspended; residents urged to remain in their homes. Police are conducting a door-to-door manhunt for second bombing suspect.
See how your city's black-white segregation levels have changed between 1970 and 2010.
Even though they lose about a half a billion dollars a year.
Both President Obama and Rep. Paul Ryan propose cutting non-defense discretionary spending to a historic low.
Participants in the 2013 Boston Marathon hailed from across the globe.
Early reports suggest at least one of the bombs used in yesterday's Boston Marathon attack was hidden in a garbage can. There's a case to be made for removing them all.
New York, Los Angeles, and Washington, D.C. have stepped up police presence on transit, at tourist attractions, and near hotels.
If there's an uplifting lesson from Boston, it may be the many people who will overcome the trauma of tragedy.
Race officials are reviewing security precautions with local police after the attacks in Boston Monday.
Modern-day militia activists have attempted to hold rallies on this holiday in recent years.
Maps of where blasts occurred, the race course, the streets in question.
Scores are rising as teachers track data and look for patterns to improve classroom learning.
Inside the Hermit Kingdom.
An intriguing theory about the geography of the "middle ground" on guns.
"From day one we were getting a lot of phone calls from nervous patients."
It's not the spread-out icons of Phoenix and Las Vegas, but rather pockets of the South Atlantic, Texas and the Pacific Northwest.
Also, politicians in Racine ban weapons (except for their own) and New York battles a slimy lake menace.
Three programs to watch as federal budget negotiations kick off.