Photos: Boston Marathon Bombings Memorial

The family of Boston Marathon bombing victim Martin Richard is joined by Massachusetts Governor Deval Patrick, center, at the finish line for a wreath-laying ceremony in Boston, April 15, 2014. Richard's family members include his sister Jane, third from right, who lost a leg in the attack, her mother Denise, second from right, and brother Henry, right. Brian Snyder / Reuters

Sharon Neary, of Rochester, New York, cries while watching a billboard television screen broadcasting the ceremony commemorating the one year anniversary of the bombing. Andrew Burton / Getty Images

A memorial for the victims of the bombings is placed near the race’s finish line. Brian Snyder / Reuters

Honor guards stand beside a wreath at the site of one of the two bomb blasts. Dominick Reuter / Reuters

Former Boston Mayor Tom Menino, second from left, wipes his face during a moment of silence with current Boston Mayor Marty Walsh, third from left, U.S. Vice President Joe Biden, center, Massachusetts Governor Deval Patrick, second from right, and Boston Athletic Association Executive Director Tom Grilk, during a ceremony at the finish line. Brian Snyder / Reuters

Flowers lie on the finish line. Andrew Burton / Getty Images

Heather McDade, of Boston, right, and others watch a tribute ceremony with others on an outdoor monitor. Steven Senne / AP