A vigil was held at Boston Common Tuesday, to remember the victims of Monday's Boston Marathon explosions. After sunset people moved through the crowd, reading music by candlelight. (George Hicks/WBUR)Alix Mcmanus a student at Simmons re-arranges the flowers while national guard look on. (Jesse Costa/WBUR)Boston Public works worker picking up trash blowing in the wind on Clarendon St. (Jesse Costa/WBUR)An Army National Guard member searches the bag of a woman as she entered an MBTA subway station near Boston Common, Tuesday, April 16, 2013. (AP Photo/Josh Reynolds)National Guard members seal off Boylston St. at Massachusetts Ave. Tuesday, April 16, 2013 (Joe Spurr/WBUR)Investigators in haz-mat suits examine the scene of the second bombing on Boylston Street in Boston Tuesday, April 16, 2013 near the finish line of the 2013 Boston Marathon, a day after two blasts killed three and injured over 170 people. (AP Photo/Elise Amendola)A 29-year-old Medford resident Krystle Campbell has been identified as one of three people killed yesterday during the Boston Marathon blasts. (Hordon Health Facebook page)
Flowers sit at a police barrier near the finish line of the Boston Marathon in Boston Tuesday, April 16, 2013. (AP Photo/Winslow Townson)This undated photo provided by Bill Richard, shows his son, Martin Richard, in Boston. Martin Richard, 8, was among the at least three people killed in the explosions, Monday, April 15, 2013, at the finish line of the Boston Marathon. (AP Photo/Bill Richard)
Flowers on Boylston Street. Tuesday, April 16, 2013. (Joe Spurr/WBUR)The International Brotherhood of Electrical Workers Local 103 in Dorchester, Mass. displayed these messages on their electronic billboard Tuesday afternoon, April 16, 2013President Barack Obama speaking at the White House in Washington, Tuesday, April 16, 2013, following the explosions at the Boston Marathon. (AP Photo/Charles Dharapak)A policeman stands in a deserted Boylston Street, at Arlington Street on Tuesday morning. (Joe Spurr/WBUR)Police and investigators examine the area around the finish line of the Boston Marathon on an empty Boylston St, in Boston, Tuesday, April 16, 2013. (AP Photo/Charles Krupa)Boston firefighters, right, talk with FBI agents and a crime scene photographer at the scene of Monday's Boston Marathon explosions, which killed at least three and injured more than 140, in Boston, Tuesday, April 16, 2013. (AP Photo/Charles Krupa)An Amtrak police officer stands watch at South Station in Boston Tuesday, April 16, 2013, as commuters disembark the morning after two explosions went off near the finish line of the Boston Marathon. (AP Photo/Denise Lavoie)Neighbors hug outside the home of the Richard family in the Dorchester neighborhood of Boston, Tuesday, April 16, 2013. Martin Richard, 8, was killed in Mondays bombing at the finish line of the Boston Marathon. (AP Photo/Michael Dwyer)Workers find bags containing runners' personal effects as they return them to their owners near the finish line of the Boston Marathon, Tuesday, April 16, 2013. (AP Photo/Charles Krupa)Boston police officers keep a perimeter secure in Boston's Copley Square, Tuesday, April 16, 2013 as an investigation continues into the bomb blasts at the finish area of the Boston Marathon. (AP Photo/Elise Amendola)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 140 at the Boston Marathon, Tuesday, April 16, 2013. (AP Photo/Charles Krupa)A runner passes a police officer dressed in tactical gear, who blocks a road leading to the Boston Marathon route in Boston. (AP Photo/Charles Krupa)Runner Megan Cloke pauses after placing flowers on the doorstep of the Richard house in the Dorchester neighborhood of Boston,Tuesday, April 16, 2013. Martin Richard,8, was killed in Mondays' bombings at the finish line of the Boston Marathon. The boy’s mother, Denise, and 6-year-old sister, Jane, were badly injured. (AP Photo/Michael Dwyer)Peace is written on the sidewalk in front of the Richard house in the Dorchester neighborhood of Boston, Tuesday, April 16, 2013. (AP Photo/Michael Dwyer)
This program aired on April 16, 2013. The audio for this program is not available.