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3 killed in Marathon blasts

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.

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.

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 blast a few blocks away on Boylston Street.

Amid shock at Marathon, a rush to help strangers

In the moments after the two explosions on Boylston Street, many were fleeing, but many were running to the wounded.

Brothers watching Boston Marathon each lose a leg

Liz Norden’s two sons went to watch a friend run, and a few hours later she learned they both lost a leg from the knee down.

The Nation

Justices wary of bold action on gene patenting

SEEKING NARROW PATH

By Adam Liptak

The court’s ruling will shape the course of scientific research and will affect the willingness of businesses to invest.

Chances for gun background checks unclear

Senators Joe Manchin (right) and Patrick Toomey crafted an amendment to draw support for criminal checks for guns.

By Dina Cappiello

Seven Republicans amenable to a gun control debate were still resisting an expansion of background checks.

Republican donors back reform on immigrants

By Steve Peoples

As Congress readies for a drawn-out immigration debate, many Republican fundraisers are pressing for a path to legal status.

The World

Attacks across Iraq as elections near; at least 55 dead

By Adam Schreck

The assault bore the hallmarks of a resurgent Al Qaeda in Iraq and appeared aimed at sowing fear days before the first elections since US troops withdrew.

Venezuela to certify vote result

Supporters of Venezuela’s acting president, Nicolas Maduro, cheered his apparent victory in Sunday’s presidential vote.

By Frank Bajak

Venezuela indicated it would certify the presidential victory of Hugo Chavez’ hand-picked successor, ignoring demands for a recount.

Pope Francis supports crackdown on US nuns

By Nicole Winfield

The pope supports the Vatican’s crackdown on the Leadership Conference of Women Religious, who were accused of promoting ‘‘radical feminist themes.”

Editorial & Opinion

JULIETTE KAYYEM

A spectator event with no doors

Medical workers swarmed the explosion site at the finish line of the 2013 Boston Marathon.

By Juliette Kayyem

Public safety officials were on high alert, but no marathon can ever be totally secure.

lawrence harmon

Working theories for who did this

By Lawrence Harmon

The image of the dead and wounded lying near the finish line of the 2013 Boston Marathon will be burned into the memory of Americans for decades to come.

Derrick Z. Jackson

Runners and supporters share a bond of trust

By Derrick Z. Jackson

One of the only things that is clear is that the attack struck directly at the deep connection between sports and our common civic life.

Metro

3 killed in Marathon blasts

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.

By Mark Arsenault

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.

Wampanoag turn up pressure on gambling panel

“We’re going to do everything in our power to protect and respect . . . our rights as a federal sovereign nation,” Mashpee Wampanoag chairman Cedric Cromwell, said in an interview. “We will do that.”

By Mark Arsenault

The Mashpee Wampanoag want the state gambling commission to keep a freeze on commercial casino projects in Southeastern Mass.

Brothers watching Boston Marathon each lose a leg

Liz Norden leaned on JimCasey, her sons’ uncle, as they awaited word on Norden’s sons.

By Patricia Wen

Liz Norden’s two sons went to watch a friend run, and a few hours later she learned they both lost a leg from the knee down.

More Stories

Tight security will be rule today in Boston

By Michael Levenson and Eric Moskowitz

Kevin Cullen

A perfect Marathon day, then the unimaginable

By Kevin Cullen

Mayor Menino leaves hospital to attend to crisis

By Todd Feathers and Deborah Kotz

Hospital scene after marathon was like a battle zone

By Kay Lazar, Carolyn Y. Johnson and Patty Wen

Emergency numbers

By Todd Feathers

Confusion for marathoners leavened by kindness

By Martine Powers and Evan Allen

Silence and solace as athletes, friends gather

By Billy Baker and Chelsea Conaboy

Anxious calls flood in from afar after explosions

By Andrew Ryan and Lisa Wangsness

Business

Wayfair posts sales increase of 40 percent for quarter

By Michael B. Farrell

The online retailer, a Boston company flirting with an initial public stock offering, posted a 40 percent increase in first-quarter sales.

Thermo Fisher to buy Life Technologies for $13.6b

Thermo Fisher reportedly had to outbid rivals for Life Technologies, a leading seller of DNA-sequencing tests.

By Robert Weisman

The deal will establish Thermo Fisher Scientific as the global leader in life sciences tools and a top player in the emerging field of genetic screening.

Mass. home insurer seeks hike in premiums

By Taryn Luna

Fair Plan, the state’s home insurer of last resort, is proposing to increase rates an average of 6.8 percent.

Obituaries

Nancy Popkin Popkin, writer, publicist whose name intrigued, amused

Mrs. Popkin was an award-winning reporter and editor for The Jewish Advocate and The Daily Item in Lynn.

By Bryan Marquard

Beyond the ear-catching echo in her name, Mrs. Popkin, 83, was memorable as much for her biography as for her work.

Bob Perry, bankrolled Swift Boat campaign against Kerry

Mr. Perry founded Houston-based Perry Homes, one of the largest homebuilders in Texas.

By Paul J. Weber and Will Weissert

Mr. Perry, 80, was a Republican megadonor who shunned the spotlight, financing many GOP candidates behind the scenes.

Marty Blake, legendary NBA talent spotter

By Bruce Weber

Mr. Blake, 86, was a basketball executive whose memory and eye for talent made him perhaps the most valuable scout in NBA history.

Sports

Dan Shaughnessy

Boston Marathon will never be the same

A first responder scoops aside a youngster after the explosions at the finish line of the Boston Marathon.

By Dan Shaughnessy

More end to more innocence. The journey from Hopkinton to Boylston Street is now a 26.2-mile stretch of yellow police tape.

Lelisa Desisa, Rita Jeptoo win Boston Marathon

Men’s winner Lelisa Desisa and women’s champ Rita Jeptoo indicate their status in the 117th running of the Marathon.

By Nancy L. Marrapese-Burrell

Desisa, an Ethiopian, was the winner in the men’s race and Jeptoo, a Kenyan, captured first in the women’s race.

Security always on minds of officials at marathons

By Shira Springer

The future will bring tighter security in Boston and at marathons around the world, though security always has been a pressing concern.

G: Living

G Cover

New England autism treatment, Abu Dhabi-style

From left: teacher Clara Steece with student Sam, teacher Melissa Clark with Brian, and teacher Megan Anderson with Eliza during a session at the New England Center for Children in Southborough. The center is a leader in the treatment of autism.

By Bella English

When a member of the United Arab Emirates ruling family was diagnosed with autism, a Southborough center answered the call.

Jazz pianist’s musical heart has an African pulse

Randy Weston, 87

By Jeremy D. Goodwin

Randy Weston, 87, caps a two-day residency at the New England Conservatory with a free concert at Jordan Hall on April 18.

Stage Review

A joyful ‘Longstocking’ at Wheelock Family Theatre

Sirena Abalian has the title role in the Wheelock Family Theatre production of “Pippi Longstocking.”

By Terry Byrne

The production focuses on joy and whimsy, with a whole lot of chances to dance, dance, dance.

More Stories

Album Review | Indie Rock

On ‘Mosquito,’ buzz-worthy tunes from Yeah Yeah Yeahs

By James Reed

Album Review | COUNTRY

Kim Richey, ‘Thorn in My Heart’

By Sarah Rodman

Album Review | Psychedelia

The Flaming Lips, ‘The Terror’

By Marc Hirsh

Album Review | HIP-HOP

Ghostface Killah and Adrian Younge, ‘Twelve Reasons to Die’

By Ken Capobianco

Album Review | Singer-Songwriter

Various Artists, ‘Way to Blue: The Songs of Nick Drake’

By Steve Morse

Book Review

‘Ghost Moth’ by Michèle Forbes

By S. Kirk Walsh

Tuesday Night Television

Critic’s corner: What’s on TV tonight

By Matthew Gilbert

Events

Boston-area to do list

By June Wulff

Annie's Mailbox

Ask Amy column

Names

Local celebrities tweet their love of Boston

By Mark Shanahan and Meredith Goldstein

Names

Brandeis postpones screening of ‘The East’

By Mark Shanahan and Meredith Goldstein

Names

Harry Chapin’s widow a surprise guest at Majestic

By Mark Shanahan and Meredith Goldstein

Names

Chris Evans all smiles at MTV Movie Awards

By Mark Shanahan and Meredith Goldstein

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Celebrities spotted in and around town

By Mark Shanahan and Meredith Goldstein

Music Review

Brad Mehldau, Chris Thile are two of a kind

By Jon Garelick

Music Review

A colorful tribute to Oliver Knussen from BMOP

By Matthew Guerrieri