Terror at the Marathon

The jolt of the first blast knocked this runner to the ground and prompted police to spring into action.

John Tlumacki/Globe Staff

A woman received help following the first of two explosions on Boylston Street Monday. Medical workers at the scene treated life-threatening wounds and losses of limbs

john Tlumacki/Globe staff

The scene along the sidewalk near the bombing was gruesome.

John Tlumacki/Globe Staff

The blast created a smoky haze that contributed to the confusion that reigned in the ensuing minutes.

John Tlumacki/Globe Staff

Tthe first of two successive bombs exploded along Boylston Street just before 3 p.m.

David L. Ryan/Globe Staff

Just seconds after the first explosion rocked the area near the Boston Marathon finish line at about 2:50 p.m., there was a second blastafew blocks away on Boylston Street

David L. Ryan/globe staff

Ben Thorndike

A victim of the first explosion near the finish line of Monday’s Boston Marathon was helped on the sidewalk of Boylston Street. Hospitals reported treating at least 140 patients.

John Tlumacki/Globe staff

First responders wheeled away one of the injured on a stretcher.

John Tlumacki/Globe Staff

A woman knelt and prayed at the scene of the first explosion at the marathon finish line on Boylston Street.

John Tlumacki/Globe staff

A man comforted one of the victims along the sidewalk.

John Tlumacki/Globe staff

A man tried stop the bleeding of another man's leg at the finish line of the Boston Marathon.

John Tlumacki/Globe Staff

Aaron Tang for the Boston Globe

Emergency personnel were on the scene at 2:52;

Aaron Tang for the Boston Globe

Aaron Tang for the Boston Globe

Aaron Tang for the Boston Globe

Rick Biagiotti (left) and Brian Bridges helped Kris Biagiotti(yellow jersey) get Kayla to the finish after the first blast

David L. Ryan/Globe staff

Cellphone service went down in Boston briefly as loved ones tried to locate one another.

Bill Greene/Globe staff

Race volunteer Katherine Swierk (left) was reunited with her aunt Terry Days (center) and friend Jocelyn Cacio.

John Blanding/Globe staff

Boston Police examined blown-out windows at the scene of the first explosion on Boylston Street, at the finish line of the Boston Marathon,

JOHN TLUMACKI/GLOBE STAFF

Runners who had not yet finished the race were stopped on Commonwealth Avenue.

Yoon S. Byun/Globe staff

Emergency medical personnel transported the injured for treatment.

David L. Ryan/Globe Staff

A runner walked away from Boston Common aftermarathoners were diverted following the explosions.

Barry Chin/Globe staff

Dr. Allan Panter was waiting for his wife, Theresa, when the first bomb went off. He tried in vain to help a woman who later died of a chest wound.

Yoon S. Byun/Globe Staff

Angela Hamilton of Hickory, N.C., attended a prayer service at the Cathedral Church of St.Paul Tuesday

Wendy Maeda/Globe staff

Officer Samora Lopes tied T-shirts on a barrier on Boylston Street.

David L. Ryan/Globe Staff

FBI and other officials continued to investigate the scene of the bombings on Boylston Street. They searched the streets and rooftops for clues.

David L Ryan/Globe staff

John Tlumacki/Globe staff

investigators pored over the location the day after the bombings.

David L. Ryan/Globe staff

Remains of a backpack the FBI says contained one bomb

Associated press

Police tape blocked off access to the area.

John Tlumacki/Globe Staff

William Campbell tried to comfort his mother, Patricia, on Tuesday as she tried to read a statement about her daughter, Krystle.

BILL GREENE/GLOBE STAFF

Neighbors left flowers outside the Dorchester home of the eight-year-old killed during the attack.

Evan Allen/Globe staff

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

Amtrak police officer Joe Agnellino and his bomb detection dog checked passengers before they boarded a train at SouthStation Tuesday.

Bill Greene/Globe Staff

Bags of belongings left by runners at the starting line Monday were stacked like sandbags Tuesday on St. James Avenue.

David L. Ryan/Globe Staff

Visitors at the memorial received some pet therapy from Duffy,a great Pyreneesfrom the Pets & People and Dog Bones associations.

Essdras M. Suarez/Globe Staff

Flowers, medals, stuffed animals, cards, flags, and hats pack a makeshift memorial at the corner of Boylston and Berkeley streets for the victims of the Marathon bombings

ESSDRAS M SUAREZ/ GLOBE STAFF

President Obama met with Marathon officials, including Matt West, at Cathedral High School.

John Tlumacki/Globe Staff

Mayor Thomas M. Menino spoke at the interfaith service following the bombings.

David L. Ryan/Globe Staff

Governor Deval Patrick was also among the speakers.

David L. Ryan/Globe staff

It was standing room only in the aisles of the church for the service at the Cathedral of the Holy Cross.

David L. Ryan/Globe Staff

From left: Priscilla Winter of Dorchester, Brandi Artez of the South End, Priscilla Rorie, and Roberta Mankus of Holbrook listened to President Barack Obama during his speech on an iPhone.

Yoon S. Byun/Globe Staff

The staff and patrons at Stadium Sports Bar and Grille in South Boston watched the memorial service.

Joanne Rathe/ Globe Staff

Jose Briceno of Cambridge held a US flag in front of the cathedral after the service was let out.

Yoon S. Byun,/Globe Staff

AA photograph of Boston University graduate student Lingzi Lu sat next toamessage board outside the school’s Marsh Chapel.

Julio Cortez/Associated press

FBI investigators combed Boylston Street near Berkeley Street for clues.

Bill Greene/Globe staff

On Hopkinton’s town green, near the Marathon start, people joined hands to pray for those hurt and killed at the finish.

Wendy Maeda/Globe staff

Alan Biggers hugged Ryan Lynch at the vigil.

Wendy Maeda/Globe Staff

Geshe Tenley, a monk from the Kurukulla Center in Medford, visited the memorial at Boylston and Berkeley streets.

Bill Greene/Globe staff

Boston, MA - 4/17/13 - A sign hangs on a barricade to A note of support and defiance was posted on a barricade on Boylston Street, near the site of the twin bombings.

Bill Greene/Globe Staff

The FBI released a photo of Suspect1, Dzhokhar Tsarnaev.

Both suspects were seen on surveillance cameras on the day of the bombing.

Photos of Dzhokhar and Tamerlan Tsarnaev, then persons of interest, were revealed during a press conference.

Barry Chin/Globe staff

Ruslan Tsarni in Montgomery Village, Md., the uncle of the bombing suspects, reacted to the news.

ALLISON SHELLEY/GETTY IMAGES

A K-9 unit searched near MIT following the shooting of officer Sean Collier.

Aram Boghosian for the Boston Globe

An American flag fluttered in the wind Friday at the scene of the slaying of MIT police Officer Sean Collier.

Jim Davis/Globe Staff

As what would normally be a busy lunch time approached, the scene was anything but busy as a police officer and some pigeons were among the few things in sight.

Jim Davis/Globe Staff

Military Police stood guard outside the Park Street Station Friday after the entire public transit system was shut down.

Suzanne Kreiter/Globe Staff

A deserted Watertown Square remained quiet with very little movement but flags flying, at approximately 6 a.m.

Bill Greene/Globe Staff

This was a portrait of at least part of the Public Garden about an hour before noon — lots of color but no people.

Jim Davis/Globe Staff

A police officer halted traffic as the city was shut down in the wake of the bombings and amid a massive manhunt.

SUZANNE KREITER/GLOBE STAFF

Amid the lock-down that paralyzed the area, a lone bicycle rider headed across the Longfellow Bridge.

JONATHAN WIGGS/GLOBE STAFF

Police in SWAT gear conducted searches on Nichols Avenue at Dexter Avenue in an area of Watertown that was in lockdown.

David L. Ryan/Globe Staff

SWAT teams moved into position at the intersection of Nichols Avenue and Melendy Avenue in Watertown.

Aram Boghosian for the Boston Globe

The ambulance carrying Dzhokhar Tsarnaev left the scene of his capture.

CJ GUNTHER

Louise Hunter and others on Arsenal Street cheered on officials leaving the scene after the capture of the bombing suspect in Watertown.

Bill Greene/Globe Staff

Boston Police Commissioner Ed Davis was on the scene in Watertown.

Stan Honda/AFP

Globe coverage of the April 15, 2013 bombings at the Boston Marathon and the events that followed.

102 hours in pursuit of Marathon suspects

The Globe’s authoritative account of the bombings and the largest manhunt in regional history.

Carjacking victim describes harrowing night

A 26-year-old Chinese entrepreneur described his abduction and escape from the Marathon bomb suspects in an exclusive interview.

12/15/2013 | A Boston Globe investigation

The fall of the house of Tsarnaev

A five-month Globe investigation of the two suspects in the Marathon bombings and their deeply dysfunctional family.

Tamerlan (left) and Dzhokhar Tsarnaev seemed to be on promising paths, and then, apparently with little warning, they veered violently off track.

Brothers in Marathon bombings took two paths into infamy

Adrianne Haslet, a dance instructor, and her husband Adam Davis, an Air Force captain, were both injured in the Marathon bombings.

The wounded

Marathon bombing victim Gillian Reny and her mother, Audrey Epstein Reny, were back at Brigham and Women’s Hospital for another appointment on Tuesday.

Marathon bombing victim builds on her recovery

Doctors saved Gillian Reny’s mangled leg after the attack; now her family is raising funds for trauma research.

Celeste Corcoran (left) and her daughter Sydney have been side by side in navigating their recovery from the bombings.

After Marathon attack, Lowell family healing

Celeste and Sydney Corcoran, the mother and daughter nearly killed in the Marathon bombings, end 2013 with a profound gratitude to simply be alive.

Immediate aftermath of the explosions

A woman received help at the scene of the first of two explosions on Boylston Street Monday. Medical workers at the finish line treated life-threatening wounds and losses of limbs.

3 killed in Marathon blasts

Two bomb blasts, 12 seconds apart, rocked the finish line of the Boston Marathon, killing at least three people, including an 8-year-old boy.

Thousands of runners were suddenly stopped by police and race officials on Commonwealth Avenue because of two bomb explosions at the finish line of the Boston Marathon.

Joyous event turns shocking as tragedy halts Marathon

For 116 years, the world’s most fabled footrace had been a place of concelebration. This time, it was a place of blood and chaos.

Watertown manhunt and capture

David and Beth Henneberry, with the trailer for their new boat, in Watertown.

Boat owner seeks to clarify record on Tsarnaev capture

David Henneberry said he’s “not crazy” and would never have approached his boat if he thought bombing suspect Dzhokhar Tsarnaev was inside.

Louise Hunter and others on Arsenal Street cheered on officials leaving the scene after the capture of the bombing suspect in Watertown Friday.

Second Marathon bombing suspect captured

The arrest of 19-year-old Dzhokhar Tsarnaev of Cambridge ended an unprecedented daylong siege of Greater Boston.

Prosecution of Dzhokhar Tsarnaev

Pro-Tsarnaev demonstrators were in front of the Moakley courthouse last week.

Tsarnaev lawyers want ‘supporters’ moved away from courthouse

The defense attorneys don’t want their client associated with the demonstrators’ “outrageous conspiracy theories.”

Dzhokhar Tsarnaev, as depicted during a Dec. 18 court hearing.

Prosecutors oppose moving Tsarnaev trial

Federal prosecutors said the case has been properly litigated and is prepared for Monday, the scheduled start date.

Others charged

Tsarnaev friend pleads guilty to heroin, gun charges

Stephen Silva pleaded guilty to possessing a gun similar to the one used by the bombing suspects to kill an MIT police officer.

Compensating the victims

Branden Mattier posted a picture of himself in front of the One Fund offices. He faces two misdemeanor counts.

An alleged try to bilk One Fund Boston of $2.2m

Branden Mattier allegedly attempted to defraud the relief effort by claiming that his long-dead aunt was injured in the Marathon attack.

One Fund to distribute nearly $61 million to victims

The money will be given to 232 individuals and families starting Sunday, marking the end of a crash campaign to help Marathon bombing victims.

Tamerlan Tsarnaev

Sisters of Tamerlan Tsarnaev’s widow appear before grand jury

The sisters-in-law of dead Marathon bombing suspect Tamerlan Tsarnaev testified Thursday before a federal grand jury looking into the attack, their lawyer said.

“It was somewhat sad and somber,” said Bukhari Abdel-Alim (center), of Islamic Funeral Services of Virginia.

Marathon bombing suspect buried in Virginia

A day after the controversy swirling around the burial of Tamerlan Tsarnaev subsided in Worcester, it engulfed a rural Virginia hamlet.

Watch the explosion

Watch the aftermath of the two explosions that rocked the finish line area at the marathon.

Graphics

Timeline

The bombings and manhunt

A look at how events unfolded during the week.

Photos

Marathon bombing suspects

Details emerged about the suspects after they were identified as brothers Tamerlan and Dzhokhar Tsarnaev.

Fatal victims

In the frenetic social media traffic that followed the Marathon blasts, a photograph of the wide-eyed boy holding a hand-lettered sign — “No more hurting people. Peace” — became an international emblem of the the day’s horror. His mother and sister were also seriously injured at the site of the second bomb.

Krystle Campbell

Campbell, who grew up in Medford and moved about a year ago to Arlington, was on Boylston Street near the Marathon finish line with her friend Karen when the first bomb went off. She was remembered as a hard worker who "was always right there if you needed her," her grandmother said.

Lingzi Lu

Lu, 23, a Boston University graduate student from the northeastern Chinese city of Shenyang, was the third victim of the bombings and the last to be identified. Lu’s friends recalled her as a kind young woman with a passion for music who hoped to find love in America.

Sean Collier

Sean Collier, 26, was shot multiple times in a late-night confrontation with, officials believe, the two men responsible for the Boston Marathon bombings. He was known for having a knack for earning people’s trust, and for building rapport with the community he policed.

2011 Waltham triple murders

Many questions 10 days after FBI killed Fla. suspect

Many voices are calling for an independent investigation into the death of Ibragim Todashev amid shifting accounts of what happened in Orlando.

At first it seemed a grisly triple homicide in Waltham on Sept. 11, 2011, was a drug deal gone bad.

Waltham victim’s girlfriend says Tsarnaev visited

The girlfriend of one of three men brutally killed in a Waltham apartment in 2011 was the first to assert that police were aware that Tamerlan Tsarnaev had ties to the victims.

Healing the city

Flowers lay against a barricade near the finish line of the Boston Marathon and the site of deadly twin bombings.

Boston: Forever changed

Former US poet laureate Robert Pinsky, who teaches at Boston University, shares his reaction to the Boston Marathon bombings.

Donations and words of support — some of which are displayed around this story — poured into the One Fund.

In letters to One Fund, a child’s hope shines through

Officials said they have received more than 50,000 letters, many from children eager to help in the Marathon bombings’ aftermath in any way they could.

Rescue accounts

Nicole Fluet McGerald (right) assisted at a race in Hampton, N.H., Oct. 6 in which colleague Amanda McCann ran.

First responders still in grip of Marathon’s horror

Six months after the Marathon bombings, the terror of that long, frantic afternoon on Boylston Street still haunts many of those who treated the wounded.

Bombing victim Erika Brannock said of North, “I honestly don’t believe I’d be here if it weren’t for her.”

Bomb victim reunites with woman who helped save her

Erika Brannock was reunited with her hero, Amanda North, the woman who aided her immediately following the blast at the finish line of the Marathon.

Funerals and memorials

Krystle Campbell was one of three people killed in the April 15 bombings near the Boston Marathon’s finish line.

UMass Boston unveils portrait of Krystle Campbell

The university has found another way to honor the memory of Campbell, a former student killed in the Boston Marathon bombings.

About 200 colleagues, allies, and strangers gathered in Cambridge to honor MIT Police Officer Sean Collier.

Six months after death, Sean Collier plaque unveiled

About 200 colleagues, allies, and strangers gathered in Cambridge to honor slain MIT officer Sean Collier.

Investigation

Fireworks were recovered in a backpack belonging to Dzhokhar Tsarnaev that was discarded in NewBedford.

Brothers first planned July 4 attack, officials say

The surviving suspect told investigators he and his brother initially planned to detonate explosives during the July Fourth celebration, officials said.

Azamat Tazhayakov (left) and Dias Kadyrbayev (center) were in the United States on invalid visas, officials say.

Student visa system gets scathing review

Homeland Security officials have redoubled efforts to check foreign students’ visas at airports and border crossings.

Terror at the Marathon

Brothers in Marathon bombings took two paths into infamy

The Boston Marathon wounded

interactive graphic and essay

Panorama: The Marathon memorial

Video

Five days in April

Marathon bombing victim builds on her recovery

After Marathon attack, Lowell family healing

Immediate aftermath of the explosions

3 killed in Marathon blasts

Joyous event turns shocking as tragedy halts Marathon

Watertown manhunt and capture

Boat owner seeks to clarify record on Tsarnaev capture

Second Marathon bombing suspect captured

Prosecution of Dzhokhar Tsarnaev

Tsarnaev lawyers want ‘supporters’ moved away from courthouse

Prosecutors oppose moving Tsarnaev trial

Others charged

Tsarnaev friend pleads guilty to heroin, gun charges

Compensating the victims

An alleged try to bilk One Fund Boston of $2.2m

One Fund to distribute nearly $61 million to victims

Tamerlan Tsarnaev

Sisters of Tamerlan Tsarnaev’s widow appear before grand jury

Marathon bombing suspect buried in Virginia

Graphics

Photos

Fatal victims

2011 Waltham triple murders

Many questions 10 days after FBI killed Fla. suspect

Waltham victim’s girlfriend says Tsarnaev visited

More on the bombing suspects

Older brother, killed after shoot-out, ‘was up to no good,’ cousin says

For bombing suspect’s nurses, angst gave way to duty

Healing the city

Boston: Forever changed

In letters to One Fund, a child’s hope shines through

Rescue accounts

First responders still in grip of Marathon’s horror

Bomb victim reunites with woman who helped save her

Funerals and memorials

UMass Boston unveils portrait of Krystle Campbell

Six months after death, Sean Collier plaque unveiled

Investigation

Brothers first planned July 4 attack, officials say

Student visa system gets scathing review

Reaction to the bombing

JOANNA WEISS

He who should be named

JOAN VENNOCHI

Politics deep-sixes bombing hearing