For the White family of Bolton, Massachusetts, it's a bittersweet morning.
Bill and Mary Jo White will be at the finish line cheering on their son Kevin where all three nearly lost their lives one year ago.
Kevin, then 34, had shrapnel all through his legs. Â Mary Jo, then 67, caught shrapnel in her arm and it broke her wrist, and Bill White, at 71, lost his leg.
The father says: "When I woke up after the surgery the first thing that dawned on me was I have only one leg. And that's a shattering moment for you. You lay there and say how am I going to live the rest of my life?"
White tells CNN's John Berman he learned to get over those types of questions to continue living his life.
"I'm not a person who gives up easily," he says.
WATCH VIDEO ABOVE TO SEE MORE OF THE FAMILY'S STORY