-- Three years ago, when terrorist bombs rained down on the Boston Marathon, Adrianne Haslet-Davis and her husband were injured while on the sidelines.
Haslet-Davis had to have her lower left leg amputated. She had been a professional ballroom dancer at the time of the 2013 blast.
Monday, she returned to the 26.2 mile race -- this time as a competitor.
"I wanted to say a giant thank you to anyone who's ever reached out, given a hug or a letter or kind words to myself and all the other survivors," she told ABC affiliate WCVB-TV in Boston.
"Two years ago I was lucky enough to meet Adrianne Haslet, a survivor of the 2013 Marathon bombings," he wrote Monday on Facebook. "She's on the course now, running the race for the first time -- with a prosthetic leg. Adrianne thank you for being my inspiration!! #?BostonStrong?."
Haslet-Davis is slated to cross the finish line Monday evening and expects it will be an emotional experience.
"I just hope I have enough hydration to cry and run at the same time," she said.