Dan Lampariello
Three people were killed and at least 180 injured after two explosions shattered the euphoria of the 2013 Boston Marathon finish line. Authorities rushed to carry off the injured runners and spectators, while the stragglers were rerouted away from the smoking site of the blasts.
John Tlumacki/The Boston Globe/AP
Police react to a runner who was knocked down after the second explosion near the finish line of the 2013 Boston Marathon.
Kenshin Okubo/The Daily Free Press/AP
People react to an explosion at the 2013 Boston Marathon.
John Tlumacki/The Boston Globe/AP
People react to an explosion at the 2013 Boston Marathon.
Kenshin Okubo/The Daily Free Press/AP
People react to an explosion at the 2013 Boston Marathon in Boston.
Kylie Atwood/CBS News
A policeman carries one of the injured after an explosion at the 2013 Boston Marathon.
Ken McGagh/MetroWest Daily News/AP
Boston Firefighter James Plourde carries an injured girl away from the scene after a bombing near the finish line of the 2013 Boston Marathon.
Ken McGagh/AP/Metro West Daily News
Injured people and debris lie on the sidewalk near the Boston Marathon finish line following an explosion in Boston, April 15, 2013.
Elise Amendola/AP
An unidentified Boston Marathon runner is comforted as she cries in the aftermath of two blasts which exploded near the finish line of the 2013 Boston Marathon.
Charles Krupa/AP
A Boston police officer wheels in injured boy down Boylston Street as medical workers carry an injured runner following an explosion during the 2013 Boston Marathon.
John Mottern/AFP/Getty Images
Runner John Ounao crying when he finds friends after several explosions rocked the finish of the 2013 Boston Marathon.
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A man is loaded into an ambulance after he was injured by one of two bombs exploded during the 117th Boston Marathon near Copley Square.
Alex Trautwig/Getty Images
A runner reacts near Kenmore Square after two bombs exploded during the 117th Boston Marathon.
Charles Krupa
Medical responders run an injured man past the finish line the 2013 Boston Marathon following an explosion.
John Tlumacki/The Boston Globe/Getty Images
A man comforts a victim on the sidewalk at the scene of the first explosion near the finish line of the 117th Boston Marathon.
Charles Krupa/AP
Medical workers aid injured people at the finish line of the 2013 Boston Marathon following explosions.
Charles Krupa/AP
Boston police clear an area following an explosion near the finish line of the 2013 Boston Marathon.
Charles Krupa
Medical workers aid injured people at the finish line of the 2013 Boston Marathon following an explosion.
Charles Krupa/AP
Medical workers aid injured people at the finish line of the 2013 Boston Marathon following an explosion in Boston.
Charles Krupa/AP
Medical workers aid an injured woman at the finish line of the 2013 Boston Marathon following two explosions.
Charles Krupa/AP
Medical workers aid injured people at the finish line of the 2013 Boston Marathon following an explosion.
Bruce Mendelsoh/AP
This is the scene after two explosions occurred during the 2013 Boston Marathon.
Kenshin Okubo/The Daily Free Press/AP
People assist an injured person after an explosion at the 2013 Boston Marathon.
Elise Amendola/AP
An injured person is loaded into an ambulance in the aftermath of two blasts which exploded near the finish line of the Boston Marathon.
Charles Krupa/AP
Medical workers aid injured people at the finish line of the 2013 Boston Marathon following an explosion.
Charles Krupa/AP
Medical workers wheel the injured across the finish line following an explosion during the Boston marathon.
Winslow Townson/AP
Justine Franco of Montpelier, Vt., holds up a sign near Copley Square in Boston looking for her missing friend, April, who was running in her first Boston Marathon, April 15, 2013.
Kenshin Okubo/The Daily Free Press/AP
A man whose pants have been shredded by the blast walks away after two explosions went off near the finish line of the 2013 Boston Marathon.
Alex Trautwig/Getty
A runner embraces another woman near Kenmore Square after two bombs exploded during the 117th Boston Marathon.
Josh Reynolds/AP
Women react as they walk from the area where there was an explosion after the 2013 Boston Marathon.
Charles Krupa/AP
A Boston police officer clears Boylston Street following an explosion at the finish line of the 2013 Boston Marathon in Boston, Monday, April 15, 2013. Two explosions shattered the euphoria at the finish line on Monday, sending authorities out on the course to carry off the injured while the stragglers were rerouted away from the smoking site of the blasts.
Charles Krupa/AP
Police clear the area at the finish line of the 2013 Boston Marathon following an explosion.
Elise Amendola/AP
Medical personnel work outside the medical tent in the aftermath of two blasts which exploded near the finish line of the 2013 Boston Marathon
Alex Trautwig/Getty
State police guard an area near Kenmore Square after two bombs exploded during the 117th Boston Marathon.
Darren McCollester/Getty Images
A swat team arrives at the corner of Stuart Street and Dartmouth Street after two explosive devices detonated at the finish line of the 117th Boston Marathon.
Darren McCollester/Getty Images
Carlos Arredondo, who was at the finish line of the 117th Boston Marathon when two explosives detonated, leaves the scene carrying a bloodstained flag.
Stuart Cahill/The Boston Herald/AP
Rescue personnel aid injured people near the finish line of the 2013 Boston Marathon following explosions.
David L. Ryan/The Boston Globe
Medical workers attend to the injured after two explosions at the 2013 Boston Marathon.
Elise Amendola/AP
One of the blast sites on Boylston Street near the finish line of the 2013 Boston Marathon is investigated by two people in protective suits.
Ben Thorndike/AP
People react to an explosion at the 2013 Boston Marathon in Boston, April 15, 2013.