VIDEO: Bombing survivor Rebekah Gregory crosses marathon finish line

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BOSTON (MyFoxBoston.com) -- "This is the day...I take my life back."

That is what Boston Marathon bombing survivor Rebekah Gregory wrote on her Facebook page, "Rebekah Gregory DiMartino's New Day New Hope" on Monday morning, before she ran part of the 2015 Boston Marathon.

Rebekah, alongside her trainer, who is also an amputee, ran the last few miles of the race and crossed the finish line. Injured after the first blast in 2013, Rebekah had her leg amputated last November, a year and a half after the bombings.

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As she crossed the finish line, the Texas native knelt down and embraced the ground just after the painted line, crying. Later, she posted a picture to her Instagram account with her forehead on the pavement and quoted a Bible passage.

She also testified during the first phase of the trial against marathon bomber Dzhokhar Tsarnaev, and wrote a letter to him on her Facebook page after her day in court was finished.

On April 8, Tsarnaev was convicted on all 30 counts he was charged with, and will face a second phase of the trial, in which jurors will consider sentencing him to death, beginning Tuesday. It is unclear which victims will testify in that phase. Click here for complete trial coverage.

Even though security was tight throughout the course of the race, particularly at the finish line, spirits were high among runners and spectators -- view photos from the day here.

On Tuedsay, one day after the marathon, Rebekah tweeted a thank you to her supporters.

"Thank you so much for everyone's kindness," she said. "I am so humbled and do not feel deserving of it in the least bit."

Last year, Rebekah married her fiancee Peter DiMartino in a ceremony wedding company The Knot funded after hearing about their incredible story. Rebekah was at the 2013 Boston Marathon with her son Noah and Peter and his extended family. They were standing near the finish line when the first bomb went off.