Federal agents are rushing tonight to figure out who attacked the Boston Marathon. We now know a 3rd person has died, and authorities are now calling it a "possible terrorist investigation." Meanwhile, people everywhere are wondering what happened. Click below to see a slideshow from today's attack:
This is not just a national story, but an international one. 96 countries were represented today. If you're still trying to find a loved one in Boston, Google has set up a "People Finder."
Plus, 14's Brandon Bartlett has been on the phone and facebooking with Tri-State runners who were there. He'll bring us their story.
Watch at 10.