Essdras M. Suarez/Globe Staff
Sisters Justine Lescarbeau (left) and Jocelyn Lescarbeau, both of Boston, sign a banner during a vigil and memorial on Boston Common.
Aram Boghosian for The Boston Globe
Sam Galvin of West Roxbury added candles to a makeshift memorial on the barricades blocking off Boylston Street.
Aram Boghosian for The Boston Globe
Members of the military walked along Boylston Street near the finish line of the Boston Marathon.
Julio Cortez/AP
Lizzie Lee, 56, of Lynwood, Wash., who had participated in her first Boston Marathon, holds a candle and a flower at a vigil at Boston Common.
Yoon S. Byun/globe staff
Emily Gillis, 7, her brother Conor, 4, of Dorchester, and their cousin Benjamin McCormick, 8, of Milton attended a vigil for blast victim Martin Richard at Garvey Park in Dorchester.
Yoon S. Byun/globe staff
Garvey Park in Dorchester was nearly filled with people during the vigil for Martin Richard, who was killed in Monday's blasts.
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Mark Duncan/AP
The Red Sox had a moment of silence for victims before a game in Cleveland, playing the Indians at Progressive Field.
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Mark Duncan
Sox second baseman Dustin Pedroia walked past a sign from an Indians fan in the dugout.
John Tlumacki/Globe Staff
Investigators were combing through the aftermath of the deadly Boston Marathon terrorist attack Tuesday.
John Tlumacki/Globe Staff
The scene outside of Marathon Sports, the site of the first bomb explosion.
John Tlumacki/Globe Staff
Police tape blocked off access to the area.
MATTHEW CAVANAUGH/EPA
A woman looked down Boylston Street Tuesday, toward the finish line of the Boston Marathon and the site of deadly bombings a day earlier.
MATTHEW CAVANAUGH/EPA
A Boston Police officer stood on Boylston Street on Tuesday.
Bill Greene/Globe Staff
Boston Police Commissioner Edward Davis spoke along with other local and federal officials Tuesday morning.
Elise Amendola/Associated Press
Senator Elizabeth Warren, Boston Mayor Thomas M. Menino, Governor Deval Patrick, and FBI special agent in charge Richard DesLauriers spoke at the press conference.
Susan Walsh/Associated Press
Speaking Tuesday afternoon at the White House, President Obama said, "We do not know whether this is an act of an organization, or an individual, or individuals."
Darren McCollester/Getty Images
A military police officer checked the identification of a man on Massachusetts Avenue on Tuesday morning.
Investigators recover materials suspected in blasts
Dorchester remembers boy who died in blast
Krystle Campbell attended Marathon finishes for years
