PHOTO: Boston Marathon Bombing victim Jeff Bauman, center, who lost both of his legs from the explosion walks the location of the first explosion, during a memorial ceremony on the fifth anniversary of the Boston Marathon Bombing, Boston April 15, 2018.
Christopher Nzenwa wipes tears away after praying at a memorial outside of Marathon Sports at the location of the first explosion, during a memorial ceremony on the fifth anniversary of the Boston Marathon Bombing in Boston, April 15, 2018.
The family of Martin Richard, foreground from left, Bill, Jane, Henry and Denise, observe a moment of silence during a ceremony at the site where Martin Richard and Lingzi Lu were killed in the second explosion at the 2013 Boston Marathon, Sunday, Ap
In this April 20, 2015 photo, Boston Marathon bombing survivor Rebekah Gregory, left, finishes the Boston Marathon on her prosthetic left leg with her trainer Artis Thompson in Boston. After her first marriage ended in divorce, Rebekah married her co
FILE - In this April 15, 2013 file photo, medical workers aid injured people following an explosion at the finish line of the 2013 Boston Marathon in Boston. Twin bombs near the finish line of one of the world's most storied races killed three people
FILE - In this April 15, 2013 file photo, medical workers aid injured people following an explosion at the finish line of the 2013 Boston Marathon in Boston. Five years after the the bombings, federally funded community programs to prevent similar at
FILE - In this April 18, 2016 file photo, Carlos Arredondo, a 2013 Boston Marathon bombing first-responder, cheers runners in the 120th Boston Marathon in Boston. Gov. Charlie Baker will join Carlos Arredondo and his wife, Victoria Foley, at the Thur
FILE - In this Oct. 3, 2013, file photo, Boston Red Sox players shag balls in the outfield during baseball practice, with the "B Strong" logo mowed into the grass in tribute to the Boston Marathon bombing victims, at Fenway Park, in Boston. Ballgames
This image released by Roadside Attractions shows Tatiana Maslany, left, and Jake Gyllenhaal in a scene from "Stronger." The film, which chronicles the story of Boston Marathon bombing survivor Jeff Bauman, will screen at the Spaulding Rehabilitation
PHOTO: Officials broke ground in Boston Wednesday, Aug. 16, 2017, for a park dedicated to Martin Richard, the 8-year-old killed in the Boston Marathon bombing in 2013.