#BostonStrong: The Most Moving Pictures from the 2015 Boston Marathon
Carlos Arredondo, a first responder at the 2013 Boston Marathon bombings, proudly holds a "Boston Strong" banner with his wife, Melinda, by the finish line.
Arredondo hands women's push rim wheelchair division winner, Tatyana McFadden, an American flag after she triumphantly crosses the finish line.
Fans clutch their coffees and snap pics as they cheer on the mobility-impaired division race taking off from the starting line in Hopkinton, Massachusetts.
Fans support the push rim wheelchair division racers in Kenmore Square with a surplus of high fives, exuberant cheers and applause.a
Boston Mayor Marty Walsh stands with Henry and Bill Richard – the brother and father, respectively, of Martin, an 8-year-old boy who was killed at the 2013 marathon bombings.
"Smile if you're a bad***!" reads one sign by the finish line of the Elite Women's race. (We're confident there were several smilers, considering all the racers are, well, pretty bad***.)
Kenyan Caroline Rotich flashes a huge grin as she charges through the finish line, earning the gold medal for the Elite Women's division.
As if the day couldn't get any more intense, Dustin Hicks of Temple Terrace, Florida, proposes to girlfriend Laura Bowerman right after crossing the finish line in Hopkinton.
Catherine Burnett of Leesburg, Virginia, gets ready to cheer on her husband – and everyone else – before he runs his first marathon.
Bundled-up volunteers prep for the race with signs of encouragement that proudly display Boston's signature accent: "Wicked HAHD but you got this!" and "Baahston loves ya!" are highlights.
Fans show their #BostonStrong pride (and protect themselves from the cold drizzle) as they make their way to the race.
Banners line Kenmore Square with words of encouragement for this year's runners.
Wave two runners take off at the starting line.