The Team Jack Foundation represented 26 families that are battling pediatric brain cancer in the Boston Marathon Monday.
Andy Hoffman says he's dedicating his run to children affected by pediatric brain cancer. All funds will go to Jack's Pediatric Neurosurgery Research Project at Boston Children's Hospital.
Tight security didn't dampened the mood for the Boston Marathon which was hit with a finish-line bombing attack that killed three people last year.
Runners were dropped off by buses bearing the message, "Boston Strong" Monday. Spectators went through tight security checkpoints before being allowed near Hopkinton Common for the start of the race. A moment of silence was observed before the marathon got under way.
Despite the heightened security, the mood is festive at the finish line. Spontaneous applause broke out as a group of Boston police officers walked near the site of last year's twin bombing. Children danced as the Rolling Stones' song "Start Me Up" blared over the loudspeakers.