Victims Of The Boston Marathon Bombings

Crosses for the three people who died in the Boston Marathon bombings: Krystle Campbell, 29, Lu Lingzi, 23, and Martin Richard, 8. These crosses appeared at a spontaneous makeshift memorial that sprang up near the site of the deadly blasts in the days after the attack. 

Patty Campbell (top right), the mother of blast victim Krystle Campbell, looks out from her porch while a neighbor (left) hands out copies of photos of her daughter in Medford, Massachusetts, on April 16, 2013.

Father Sean Connor conducts a mass to celebrate the young life of Martin Richard of Dorchester in Boston, Massachusetts, on June 9, 2013. 

A photo of Boston Marathon bombing victim Lu Lingzi, a Boston University graduate student and Chinese citizen, is seen outside the Boston University Marsh Chapel before her memorial service in Boston, Massachusetts, on April 17, 2013.

Boston marathon bombing victim Jeff Bauman (left), responder Carlos Arredondo (center), and Taylor Morris (right) of the U.S. Navy are honored in a ceremony before the New York Jets face the New England Patriots in a football game in Foxborough, Massachusetts, on September 12, 2013.

Edward Fucarile, the father of Boston Marathon bombing victim Marc Fucarile, holds up a photograph of his son as his family read a statement about his condition at Massachusetts General Hospital in Boston. Marc Fucarile's injuries included having his right leg amputated, multiple fractures in his left leg, and shrapnel in his body, including his heart.

The shoes of bombing survivor J.P. Norden read "Boston Strong" as he stands at the finish line on the first anniversary of the attack in Boston on April 15, 2014. 

Messages left at a memorial for the victims of the Boston Marathon bombings.