The Boston Marathon: From Triumph to Tragedy
The 2013 Boston Marathon was marked by blood and chaos when two explosions went off near the finish line.
Boston Marathon at 117
April 15, 2013, marked the day of the 117th Boston Marathon.
More than 23,000 athletes start the race between 10 a.m. and 10:40 a.m. ET. Photo: Aaron Tang/Flickr
First Man Crosses Finish Line
Lelisa Desisa Benti of Ethiopia crosses the finish line to win the men's division. He completes the 26.2 mile race in 2 hours, 10 minutes, 22 seconds. Photo: Jim Rogash/Getty Images
Crowds Gather to Cheer Racers
People crowd along the sides of the finish line to cheer on family and friends as they finish their grueling race.
The Boston Marathon is the world's oldest annual marathon still in existence and is one of six of the world's "major marathons." Photo: Aaron Tang/Flickr
Explosions in Boston
Two explosions go off near the finish line of the 117th Boston Marathon on April 15, 2013. Photo: David L. Ryan/The Boston Globe/Getty Images
Crowd Falls to Ground
The attack came about three hours after the winners had crossed the finish line. A loud explosion on the north side of the street went off first, followed by a second blast a few seconds later.
A number of people were bloodied. Dr. Albert Pendleton, who was stationed five feet from the finish line, described to the PBS NewsHour what he encountered: "almost all of (the injured had) lower extremity injuries. I think the blast just basically ... blew out the legs of everybody." Photo: Tim McGagh/MetroWest Daily News
Chaos and Confusion
Police and runners react while confusion and chaos ignite.
Twenty-seven thousand runners and thousands more spectators had turned out for the Boston Marathon when terror erupted. Photo: Tim McGagh/MetroWest Daily News
Tending to the Injured
People tend to an injured woman on the corner of Exeter and Newbury Streets.
Brigham & Women's Dr. Ron Walls described "ball-bearing type" objects, "just a little larger than a BB." Surgeons also removed more than a dozen small "carpenter-type nails" about a centimeter to an inch in length from one patient, he said. Photo: Bill Greene/The Boston Globe/Getty Images
Firefighter Rescues Victim
Boston firefighter Jim Plourde carries an injured spectator from the scene.
Volunteer doctors and first responders were ready on the scene where a "mobile hospital" was set up to be able to treat anything from dehydration to more severe trauma. Photo: Tim McGagh/MetroWest Daily News
Prayers at the Crime Scene
A woman kneels and prays at the scene of the first explosion on Boylston Street. Photo: John Tlumacki/The Boston Globe/Getty Images
Injured Taken to Hospitals
A person who was injured in the explosion is taken away from the scene on a stretcher.
More than 170 are wounded and three die as a result of injuries sustained by the explosion. Photo: David L. Ryan/The Boston Globe/Getty Images
Standing Guard at Hospital
Armed police officers secure the main entrance to Brigham and Women's Hospital where many of the casualties are taken to be treated for their wounds. Photo: Stan Honda/AFP/Getty Images
Boston on Edge
National Guard soldiers guard a roadblock near the scene of a twin bombing at the Boston Marathon on April 16, 2013 in Boston, Mass.
State and city police close off 12 blocks in the ongoing investigation of the crime scene. They encourage Monday's marathon spectators to submit photos or video taken for potential leads. Photo: Spencer Platt/Getty Images
Unclaimed finish line bags remain at the scene of the blasts the day after the marathon. Photo: Spencer Platt/Getty Images
Bombing Tributes on Streets
A tube of Bengay, a pain relief medecine, lays nears flowers at a memorial site at Boylston and Arlington streets along the course of the Boston Marathon on April 16. Photo: Don Emmert/AFP/Getty Images