Charlie Krupa/Associated Press

 

Boston Marathon survivor Jeff Bauman is wheeled from the site of an explosion near the finish line of the Boston Marathon by medical volunteer Devin Wang, as bystander Carlos Arredondo and EMT Paul Mitchell keep Bauman from bleeding out, Monday April 15, 2013.

Boston Marathon survivor Jeff Bauman is wheeled from the site of an explosion near the finish line of the Boston Marathon by medical volunteer Devin Wang, as bystander Carlos Arredondo and EMT Paul Mitchell keep Bauman from bleeding out, Monday April 15, 2013.

 

Mery Daniel, a Boston Marathon bombing survivor, pauses while she talks with her physical therapist Jessica Guilbert, as she takes a break from exercising with her new prosthetic leg, at Spaulding Rehabilitation Hospital, Wednesday, July 3, 2013, in Boston.

Mery Daniel, a Boston Marathon bombing survivor, pauses while she talks with her physical therapist Jessica Guilbert, as she takes a break from exercising with her new prosthetic leg, at Spaulding Rehabilitation Hospital, Wednesday, July 3, 2013, in Boston.

 

Katelyn Ohashi, of the United States, performs in the floor exercise during the American Cup gymnastics competition in Worcester, Mass., Saturday, March 2, 2013. Ohashi won the event.

Katelyn Ohashi, of the United States, performs in the floor exercise during the American Cup gymnastics competition in Worcester, Mass., Saturday, March 2, 2013. Ohashi won the event.

 

Boston College's Steven Whitney, top, and Harvard's Kyle Criscuolo go airborne as they collide during the first period of a Beanpot hockey tournament game in Boston, Monday, Feb. 4, 2013.

Boston College’s Steven Whitney, top, and Harvard’s Kyle Criscuolo go airborne as they collide during the first period of a Beanpot hockey tournament game in Boston, Monday, Feb. 4, 2013.

 

Boston Celtics forward Kevin Garnett's feet fly over the first row as he lands in the second row while chasing the loose ball against the Indiana Pacers during the second quarter of an NBA basketball game in Boston, Friday, Jan. 4, 2013.

Boston Celtics forward Kevin Garnett’s feet fly over the first row as he lands in the second row while chasing the loose ball against the Indiana Pacers during the second quarter of an NBA basketball game in Boston, Friday, Jan. 4, 2013.

 

Boston Red Sox fans celebrate during a parade in celebration of the baseball team's World Series victory, Saturday, Nov. 2, 2013, in Boston.

Boston Red Sox fans celebrate during a parade in celebration of the baseball team’s World Series victory, Saturday, Nov. 2, 2013, in Boston.

 

Grant Jampolsky, of Squaw Valley, Calif., crashes during the men's super-G race at the U.S. Alpine Ski Championships in Squaw Valley, Friday, March 22, 2013.

Grant Jampolsky, of Squaw Valley, Calif., crashes during the men’s super-G race at the U.S. Alpine Ski Championships in Squaw Valley, Friday, March 22, 2013.

 

Boston Red Sox players take batting practice as a rainbow appears in the sky above Fenway Park, before facing the St. Louis Cardinals in the World Series, Tuesday, Oct. 22, 2013.

Boston Red Sox players take batting practice as a rainbow appears in the sky above Fenway Park, before facing the St. Louis Cardinals in the World Series, Tuesday, Oct. 22, 2013.

 

Mery Daniel, a Boston Marathon bombing survivor, pauses on Boylston Street while visiting the explosion site where she lost her left leg, Friday, May 31, 2013, in Boston.  Six weeks earlier the Haitian immigrant was standing amid a throng of spectators, watching runners complete America's most famous race, when bombs detonated, killing three and injuring more than 260 others.

Mery Daniel, a Boston Marathon bombing survivor, pauses on Boylston Street while visiting the explosion site where she lost her left leg, Friday, May 31, 2013, in Boston. Six weeks earlier the Haitian immigrant was standing amid a throng of spectators, watching runners complete America’s most famous race, when bombs detonated, killing three and injuring more than 260 others.

 

Mery Daniel, a Boston Marathon bombing survivor, heads down Boylston Street with her husband Richardson Daniel, after visiting the explosion site where she lost her left leg, Friday, May 31, 2013, in Boston.  Daniel could no longer blend easily into a crowd of women out for an afternoon walk, but hoped to regain her independence to walk again.

Mery Daniel, a Boston Marathon bombing survivor, heads down Boylston Street with her husband Richardson Daniel, after visiting the explosion site where she lost her left leg, Friday, May 31, 2013, in Boston. Daniel could no longer blend easily into a crowd of women out for an afternoon walk, but hoped to regain her independence to walk again.

 

Mery Daniel, a Boston Marathon bombing survivor, wheels through a memorial for victims and survivors of the blast, at Copley Square near the race's finish line, Friday, May 31, 2013, in Boston.

Mery Daniel, a Boston Marathon bombing survivor, wheels through a memorial for victims and survivors of the blast, at Copley Square near the race’s finish line, Friday, May 31, 2013, in Boston.

 

Mery Daniel, a Boston Marathon bombing survivor, uses crutches as she heads down a hallway in her home, while husband Richardson Daniel helps prepare dinner, Thursday June 20, 2013, in the South End neighborhood of Boston. Richardson Daniel, who had been a dermatologist in Haiti, works with a group helping Autistic children in Boston.  With his wife coping with her physical changes, Richardson has had to increase his other responsibilities in their family.

Mery Daniel, a Boston Marathon bombing survivor, uses crutches as she heads down a hallway in her home, while husband Richardson Daniel helps prepare dinner, Thursday June 20, 2013, in the South End neighborhood of Boston. Richardson Daniel, who had been a dermatologist in Haiti, works with a group helping Autistic children in Boston. With his wife coping with her physical changes, Richardson has had to increase his other responsibilities in their family.

 

Paul Martino, of United Prosthetics, makes a plaster cast of what remains of Mery Daniel's left leg, as her physician, Dr. David Crandell, right, watches at the Spaulding Rehabilitation Hospital in Boston, Wednesday, May 29, 2013. Crandell, a physiatrist at Spaulding, has treated fifteen of the sixteen marathon amputees.  Behind Crandell is Mery's husband, Richardson Daniel.

Paul Martino, of United Prosthetics, makes a plaster cast of what remains of Mery Daniel’s left leg, as her physician, Dr. David Crandell, right, watches at the Spaulding Rehabilitation Hospital in Boston, Wednesday, May 29, 2013. Crandell, a physiatrist at Spaulding, has treated fifteen of the sixteen marathon amputees. Behind Crandell is Mery’s husband, Richardson Daniel.

 

Paul Martino, of United Prosthetics, helps steady Mery Daniel, as she takes her first step since losing her left leg in the Boston Marathon bombings, while getting fitted for a prosthetic leg at the company in the Dorchester neighborhood of Boston, Tuesday, June 4, 2013.  Martino's family business has been helping amputees for about 100 years, including many of the bombing survivors.

Paul Martino, of United Prosthetics, helps steady Mery Daniel, as she takes her first step since losing her left leg in the Boston Marathon bombings, while getting fitted for a prosthetic leg at the company in the Dorchester neighborhood of Boston, Tuesday, June 4, 2013. Martino’s family business has been helping amputees for about 100 years, including many of the bombing survivors.

 

Mery Daniel, a Boston Marathon bombing survivor, uses borrowed crutches as she walks with students during a fundraising walkathon for her, at the William Seach Primary School in Weymouth, Wednesday, June 5, 2013. Students at the school raised over $8,000 for Daniel, whose father Hary Volmar, pushing wheelchair, is one of their bus drivers.  Flanking Daniel is her mother, Marie Daniel, at right, and cousin Yvrantz Celestin, at left.

Mery Daniel, a Boston Marathon bombing survivor, uses borrowed crutches as she walks with students during a fundraising walkathon for her, at the William Seach Primary School in Weymouth, Wednesday, June 5, 2013. Students at the school raised over $8,000 for Daniel, whose father Hary Volmar, pushing wheelchair, is one of their bus drivers. Flanking Daniel is her mother, Marie Daniel, at right, and cousin Yvrantz Celestin, at left.

 

Mery Daniel, a Boston Marathon bombing survivor, stands as Paul Martino, of United Prosthetics, adjusts  a cover the computerized knee and foot of her prosthetic left leg, at the company in the Dorchester neighborhood of Boston, Wednesday, June 26, 2013. Daniel's right leg also suffered significant damage in the blast, with the loss of calf muscles controlling her ankle and skin that was ripped away. The custom-made prosthetic leg features the most advanced technology of the day, but is clumsy compared to the leg that Daniel lost in the bombing.

Mery Daniel, a Boston Marathon bombing survivor, stands as Paul Martino, of United Prosthetics, adjusts a cover the computerized knee and foot of her prosthetic left leg, at the company in the Dorchester neighborhood of Boston, Wednesday, June 26, 2013. Daniel’s right leg also suffered significant damage in the blast, with the loss of calf muscles controlling her ankle and skin that was ripped away. The custom-made prosthetic leg features the most advanced technology of the day, but is clumsy compared to the leg that Daniel lost in the bombing.

 

Mery Daniel, a Boston Marathon bombing survivor, steadies herself as she works out while climbing up and down stairs with her therapist Urvashi Chogle, left, at the Spaulding Rehabilitation Hospital, Friday, Sept. 27, 2013, in Boston.  Five month after the blast that took her left leg from her, Daniel is finally able to walk on her own again.

Mery Daniel, a Boston Marathon bombing survivor, steadies herself as she works out while climbing up and down stairs with her therapist Urvashi Chogle, left, at the Spaulding Rehabilitation Hospital, Friday, Sept. 27, 2013, in Boston. Five month after the blast that took her left leg from her, Daniel is finally able to walk on her own again.

 

Mery Daniel, smiles while having a snack in the cafeteria at the Spaulding Rehabilitation Hospital, Friday, Sept. 27, 2013, in Boston.  Daniel, with the care of the hospital and a prosthetic leg from United Prosthetics, has made strides in regaining mobility and independence since losing her left leg in the Boston Marathon bombings.

Mery Daniel, smiles while having a snack in the cafeteria at the Spaulding Rehabilitation Hospital, Friday, Sept. 27, 2013, in Boston. Daniel, with the care of the hospital and a prosthetic leg from United Prosthetics, has made strides in regaining mobility and independence since losing her left leg in the Boston Marathon bombings.

 

Mery Daniel, a Boston Marathon bombing survivor, walks out the front door at Spaulding Rehabilitation Hospital following a physical therapy session, Friday, Sept. 27, 2013, in Boston. Daniel, whose heart stopped twice in the emergency room while being treated and lost much of her left leg in the race day blast, has begun to slowly regain parts of her mobility and independence.

Mery Daniel, a Boston Marathon bombing survivor, walks out the front door at Spaulding Rehabilitation Hospital following a physical therapy session, Friday, Sept. 27, 2013, in Boston. Daniel, whose heart stopped twice in the emergency room while being treated and lost much of her left leg in the race day blast, has begun to slowly regain parts of her mobility and independence.

 

With a heavy presence of security, Boston police officers line Boylston Street as the lead men's runners head down towards the finish line at the 26th mile mark during the 2013 Boston Marathon in Boston, Monday, April 15, 2013.

With a heavy presence of security, Boston police officers line Boylston Street as the lead men’s runners head down towards the finish line at the 26th mile mark during the 2013 Boston Marathon in Boston, Monday, April 15, 2013.

 

Medical workers aid injured people on Boylston Street at the finish line of the 2013 Boston Marathon following explosions in Boston, Monday, April 15, 2013.

Medical workers aid injured people on Boylston Street at the finish line of the 2013 Boston Marathon following explosions in Boston, Monday, April 15, 2013.

 

Boston Marathon survivor Jeff Bauman is wheeled from the site of an explosion near the finish line of the Boston Marathon by medical volunteer Devin Wang, as bystander Carlos Arredondo and EMT Paul Mitchell keep Bauman from bleeding out, Monday April 15, 2013.

Boston Marathon survivor Jeff Bauman is wheeled from the site of an explosion near the finish line of the Boston Marathon by medical volunteer Devin Wang, as bystander Carlos Arredondo and EMT Paul Mitchell keep Bauman from bleeding out, Monday April 15, 2013.

 

Blood from victims covers the sidewalk on Boylston Street, at the site of an explosion during the 2013 Boston Marathon in Boston.

Blood from victims covers the sidewalk on Boylston Street, at the site of an explosion during the 2013 Boston Marathon in Boston.

 

Boston Marathon runner Vu Trang, of San Francisco, cries at a makeshift memorial on Boylston Street near the finish line of Monday's Boston Marathon explosions, which killed at least three and injured more than 260, in Boston, Wednesday, April 17, 2013. The bombs that blew up seconds apart near the finish line left the streets spattered with blood and glass, and gaping questions of who chose to attack at the Boston Marathon and why.

Boston Marathon runner Vu Trang, of San Francisco, cries at a makeshift memorial on Boylston Street near the finish line of Monday’s Boston Marathon explosions, which killed at least three and injured more than 260, in Boston, Wednesday, April 17, 2013. The bombs that blew up seconds apart near the finish line left the streets spattered with blood and glass, and gaping questions of who chose to attack at the Boston Marathon and why.

 

Flowers and signs adorn a barrier at Boylston Street near the of finish line of Monday's Boston Marathon explosions, which killed at least three and injured more than 140, in Boston, Wednesday, April 17, 2013.

Flowers and signs adorn a barrier at Boylston Street near the of finish line of Monday’s Boston Marathon explosions, which killed at least three and injured more than 140, in Boston, Wednesday, April 17, 2013.

 

U.S. Marshals in tactical gear stand guard outside Boston's Moakley Federal Court House after if was evacuated, Wednesday, April 17, 2013. The building was evacuated amid conflicting reports that a suspect in the Boston Marathon bombing was in custody and about to be brought into the court house.

U.S. Marshals in tactical gear stand guard outside Boston’s Moakley Federal Court House after if was evacuated, Wednesday, April 17, 2013. The building was evacuated amid conflicting reports that a suspect in the Boston Marathon bombing was in custody and about to be brought into the court house.

 

A girl looks out the window of her family's home as a SWAT team drives through her neighborhood while searching for a suspect in the Boston Marathon bombings in Watertown, Mass., Friday, April 19, 2013.

A girl looks out the window of her family’s home as a SWAT team drives through her neighborhood while searching for a suspect in the Boston Marathon bombings in Watertown, Mass., Friday, April 19, 2013.

 

Tactical teams drive through a neighborhood while searching for a suspect in the Boston Marathon bombings in Watertown, Mass., Friday, April 19, 2013.

Tactical teams drive through a neighborhood while searching for a suspect in the Boston Marathon bombings in Watertown, Mass., Friday, April 19, 2013.

 

A woman carries a girl from their home as a SWAT team searching for a suspect in the Boston Marathon bombings enters the building in Watertown, Mass., Friday, April 19, 2013.

A woman carries a girl from their home as a SWAT team searching for a suspect in the Boston Marathon bombings enters the building in Watertown, Mass., Friday, April 19, 2013.

 

A gathering of people applaud as first responders leave the scene after the arrest of a the remaining suspect of the Boston Marathon bombings in Watertown, Mass., Friday, April 19, 2013.

A gathering of people applaud as first responders leave the scene after the arrest of a the remaining suspect of the Boston Marathon bombings in Watertown, Mass., Friday, April 19, 2013.

 

A solitary runner heads down the banks of the Charles River in Cambridge, Mass., in front of the Boston skyline, at dawn the morning after explosions killed three and injured more than 260 at the Boston Marathon, Tuesday, April 16, 2013.

A solitary runner heads down the banks of the Charles River in Cambridge, Mass., in front of the Boston skyline, at dawn the morning after explosions killed three and injured more than 260 at the Boston Marathon, Tuesday, April 16, 2013.