Boston is marking the one-year anniversary of the Boston marathon bombing.
Vice-President Joe Biden and Massachusetts Governor Deval Patrick are taking part in a tribute to the victims later today.
A flag-rising ceremony and a moment of silence will be observed at the finish line.
Many of those attending the commemoration are survivors of the attack.
"I learned that I'm much stronger and more resilient than I ever could have imagined."
"I don't think anybody knows what they're capable of doing until you're forced to be in it. And, you know, I think most people would want to get back to normal. And I think that's what I want to do, and I know it sound so cliched but I just want to be normal
