Flowers placed at the finish line on the first anniversary of the attacks. (Photo by Matt Colson-WBZ-TV)
Day of Remembrance
Henry and Jane Richard join Boston Mayor Marty Walsh for a wreath laying ceremony outside the Forum restaurant. (WBZ-TV)
Day of Remembrance
The parents of Krystal Campbell attend the wreath laying on Boylston Street. (WBZ-TV Photo)
Day of Remembrance
Members of the Honor Guard line up for a wreath laying ceremony in front of The Forum. (WBZ-TV)
Day of Remembrance
First responders line up for a wreath laying ceremony near the Boston Marathon finish line. (WBZ-TV)
Day of Remembrance
(WBZ-TV Photo)
Day of Remembrance
Members of the Honor Guard line up for a wreath laying ceremony in front of The Forum. (WBZ-TV)
Day of Remembrance
A wreath laid at the finish line on the first anniversary of the marathon attacks. (WBZ-TV)
Day of Remembrance
Governor Patrick arrives at the wreath laying ceremony. (WBZ-TV Photo)
Day of Remembrance
The Norden brothers get ready to walk the entire Boston Marathon route. (WBZ-TV Photo)
Day Of Remembrance
A tribute to the marathon bombings victims outside Ladder 15 Engine 33 on Boylston Street. (WBZ-TV)
Day of Remembrance
A banner hanging on an overpass in Dorchester with a message that became synonymous with bombing victim Martin Richard. (Photo courtesy Tara/@cubston)
Day Of Remembrance
A sign honoring Sean Collier, Krystle Campbell, Lu Lingzi and Martin Richard at Copley Square. (Photo by Ben Parker-WBZ NewsRadio 1030)
Day Of Remembrance
(Photo by Andrew Burton/Getty Images)
Day Of Remembrance
(Photo by Jared Wickerham/Getty Images)
Day Of Remembrance
(Photo by Jared Wickerham/Getty Images)
Day Of Remembrance
The families of Martin Richard, Lu Lingzi and Krystle Campbell with Boston Cardinal Sean O'Malley during a wreath laying ceremony on the one year anniversary of the 2013 Boston Marathon Bombings. (Photo by Andrew Burton/Getty Images)
Day Of Remembrance
(Photo by Andrew Burton/Getty Images)
Day Of Remembrance
(Photo by Andrew Burton/Getty Images)
Day Of Remembrance
(Photo by Andrew Burton/Getty Images)
Day Of Remembrance
(Photo by Andrew Burton/Getty Images)
Day Of Remembrance
Officers stand guard next to a wreath marking the one of the bombing sites on the one year anniversary of the 2013 Boston Marathon Bombing, on April 15, 2014. (Photo by Andrew Burton/Getty Images)
Day Of Remembrance
The parents of Lu Lingzi. (Pool photo)
Day Of Remembrance
The Richard family watches the tribute ceremony. (Pool photo)
Day Of Remembrance
(Pool photo)
Day Of Remembrance
Reverend Liz Walker gives opening remarks at a tribute ceremony. (Pool photo)
Day Of Remembrance
Vice President Joe Biden along with state and local political leaders. (Pool photo)
Day Of Remembrance
Renese King sings 'America The Beautiful' as Boston Pops maestro Keith Lockhart conducts. (Pool photo)
Day Of Remembrance
(Pool photo)
Day Of Remembrance
Vice President Joe Biden and Jill Biden attend the tribute ceremony. (Pool photo)
Day Of Remembrance
Day Of Remembrance tribute ceremony. (Pool Photo)
Day Of Remembrance
Crowds outside the Hynes watch the ceremony on a billboard television screen. (Photo by Andrew Burton/Getty Images)
Day Of Remembrance
Boston Marathon bombing survivor Patrick Downes speaks at the Day of Remembrance ceremony. (Pool Photo)
Day Of Remembrance
Boston Marathon bombing survivor Adrianne Haslet Davis speaks at the tribute. (pool photo)
Day Of Remembrance
Former Mayor Tom Menino speaks at the Day of Remembrance ceremony. (Pool Photo)
Day Of Remembrance
Boston Children's Chorus sings 'Up to the Mountain' during the tribute ceremony. (Pool Photo)
Day Of Remembrance
Boston Marathon bombing survivor David Yepez speaks at the Day of Remembrance ceremony. (Pool Photo)
Day Of Remembrance
(Photo by Jared Wickerham/Getty Images)
Day Of Remembrance
(Photo by Jared Wickerham/Getty Images)
Day Of Remembrance
(WBZ-TV Photo)
Day Of Remembrance
A crowd gathered at the finish line to mark the one-year anniversary. (WBZ-TV Photo)
Day Of Remembrance
(WBZ-TV Photo)
Day Of Remembrance
The ceremony at the finish line to mark the one-year anniversary. (WBZ-TV Photo)
Day Of Remembrance
Officer Dic Donohue prepares to raise the flag at the finish line. (WBZ-TV Photo)
Day Of Remembrance
(Photo by Chris Gobeille/WBZ-TV)
Day Of Remembrance
Bill and Denise Richard (Photo by Jared Wickerham/Getty Images)
Day Of Remembrance
Carlos Arredondo, a first responder to the Boston Marathon bombings, and his wife Melida. (Photo by Jared Wickerham/Getty Images)
Day Of Remembrance
(Photo by Jared Wickerham/Getty Images)
Day Of Remembrance
(L-R) Former Boston mayor Thomas Menino, mayor Marty Walsh, U.S. Vice President Joe Biden, Governor Deval Patrick, and Tom Grilk, Executive Director, Boston Athletic Association stand together during the flag raising ceremony commemorating the one-year anniversary of the Boston Marathon bombings. (Photo by Jared Wickerham/Getty Images)