Friday is One Boston Day - a bit of the good that came from the tragedy of the Boston Marathon bombings.
Thursday night, a symbol from that awful day is back home in Boston.
It's an iconic image that lives in Boston history - Carlos Arredondo, in his signature cowboy hat, helping runner Jeff Bauman after the twin explosions at the 2013 Boston Marathon.
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Arredondo has given the hat to the Boston Athletic Association for display at the Boston Marathon Runbase on Boylston Street. It is, says BAA Executive Director Tom Grilk, a symbol.
"Strength can come even when there is sorrow," Grilk said. "That resiliency is what carries us through in the worst and darkest of moments."
In the wake of the bombings, Mayor Marty Walsh declared April 15 One Boston Day - a day to reach out and help others. Taking something good from the worst of situations.
"It's something that we have to live with, and this makes me proud to be in Boston and having this kind of event once again year after year," said Arredondo.
The Boston Marathon was forever changed by those blasts in 2013. Scott Weisberg crossed the finish line seconds before the first explosion.
"2014-15 coming back," said Weisberg. "Noticing the whole camaraderie of the people was very passionate. It had a lot of emotion. It just felt like this whole city was behind this event and we're not going to allow this event to ruin this."
Johanna Hantel was a few yards from the finish when the bombs went off. She says despite it all, the marathon is still the marathon.
"I still think it's the goal of every runner," she said. "Every runner still wants to come to Boston."
Arredondo's hat had been on display at the Crime Museum in Washington along with items from the 2013 Marathon. He says they were happy to return it to him so it can be displayed here.