Monday is the one-year anniversary of the Boston Marathon bombing which injured 260 people and claimed the lives of three others.
Thousands of people are preparing to run Monday, many as a tribute to the victims, and the Hoosier state is well-represented among them.
Matt Guwein, of Indianapolis, was among the field of runners last year when the bomb went off. He's returned this year for the 118th running of the marathon.
"It remains emotional today," Guwein said. "There's not a day I don't think about that event and what happened, and so this year I think everyone is there running for an entirely different purpose."
Organizers say they're expecting 36,000 people – the second-largest field in the race's history.
"What's the feeling in Boston on the eve of this race? Boston is buzzing," said runner Carolyn Riggs. "There's a feeling of excitement and celebration."
Riggs, originally from Indianapolis, is now an attorney living in Boston. She will run her first marathon as one of 50 runners chosen to be part of One Fund Boston, the charity formed to raise money for the bombing victims and their families.
"This is the first marathon since it happened, and the cause has been so successful," Riggs said. "To be part of it and to raise thousands of dollars and the impact my efforts have made on a cause I'm so passionate about, it's been an incredible experience I'll never forget."
Vice President Joe Biden offered his own words of encouragement for runners on Monday.
"You've become the face of America's resolve for the whole world to see," Biden said. "They know your pride and courage."