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A grim hunt for answers in wake of Marathon attack

Investigators worked Tuesday at the site of the second bomb explosion that went off near the finish line of the Boston Marathon on Monday.

JOHN TLUMACKI/GLOBE STAFF

Investigators have found evidence that timing devices were used to detonate the bombs that ripped through Boston Marathon spectators.

John J. O’Brien, former Massachusetts Department of Probation commissioner, now faces a federal case, but the date has not been set. He had resigned in 2010.

Former Mass. probation chief acquitted of conspiracy

John O’Brien was found not guilty in Suffolk Superior Court of multiple counts of conspiracy to commit bribery.

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2013/04/16/BostonGlobe.com/Metro/Images/martin-richard-facebook--90x90.jpg Photo of victim Martin Richard now a symbol

A photo of the 8-year-old boy killed in the Marathon bombing holding a peace sign has come to symbolize the tragedy worldwide.

Boston Marathon security stayed at high level

The city’s detailed security plan for the 117th running of the Boston Marathon shows the same all-out mobilization that was in place for last year’s race.

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2013/04/17/BostonGlobe.com/Metro/Images/campbell-4288--90x90.jpg Krystle Campbell remembered as ever reliable

For grieving mother Patricia Campbell, the loss of her 29-year-old daughter at the Marathon attack “doesn’t make any sense.”

Victims of explosions are facing a long road ahead

Survival is the only thing certain for the legions who were badly injured in the bombings at the Boston Marathon.

The Nation

News Analysis

In immigration bill, shift from family ties to merit

Senator Charles Schumer praised Obama for giving the senators room to craft the bill.

By Julia Preston

The part of the bill expected to draw the most controversy is a 13-year pathway to citizenship for immigrants who have been living here illegally.

Letter with poison sent to Miss. senator

By Donna Cassata

An envelope addressed to Senator Roger Wicker tested positive Tuesday for ricin, a potentially fatal poison.

Fla. hazing suspect pleads no contest

By Mike Schneider

A man charged with the hazing death of a Florida A&M student pleaded no contest and agreed to testify against others.

The World

President Obama doubts North Korea ability

President Obama also said he will not reward the provocative behavior recently exhibited by North Korean leader Kim Jong Un.

By David E. Sanger and Michael R. Gordon

Obama does not believe North Korea has the ability to miniaturize a nuclear weapon to fit atop a missile.

Germany targets suspected tax cheats

By Frank Jordans

German authorities launched raids on the homes of over 200 suspected tax cheats who allegedly have Swiss bank accounts.

Terror suspect’s US extradition halted

A European court ruled that sending Haroon Aswat to a US prison would breach his human rights due to the ‘‘severity of his mental condition.’’

More Stories

Reactor unharmed by quake, Iran says

By Nasser Karimi and Rebecca Santana

President Bashar Assad cuts rebel prison terms

By Albert Aji and Bassem Mroue

Hugo Chavez heir says US incites violence

By Vivian Sequera and Fabiola Sanchez

Editorial & Opinion

Matthew Bernstein

Runners, the marathon does matter

A runner reacts near Kenmore Square after the explosions.

By Matthew Bernstein

Runners need a way to honor the achievement of running. The takeaway is to celebrate what can never be taken away.

JEFF JACOBY

Things will be the same again

A SWAT team member stands guard near the finish line Monday.

By Jeff Jacoby

When it comes to life in Boston — the feel of freedom and the joy of living in an open society — things are going to be the same. Yes, even now.

SCOT LEHIGH

Turn grief into charity for Boston

By Scot Lehigh

A charitable foundation to aid those in need as a result of the attack and improve Boston would channel concern into something lasting.

More Stories

letters | Reeling from Marathon Terror

Poised to join next year’s marathon cheering section

letters | Reeling from marathon terror

Bearing witness to Boston’s tragedy, from 3,000 miles away

letters | Reeling from marathon terror

Placement of photo traumatizes readers

letters | reeling from marathon terror

Carnage hits home

letters | reeling from marathon terror

The way to win: Don’t give up

letters | reeling from marathon terror

In N.Y., a sense of solidarity

By

Metro

A grim hunt for answers in wake of Marathon attack

Investigators worked Tuesday at the site of the second bomb explosion that went off near the finish line of the Boston Marathon on Monday.

By Mark Arsenault and Shelley Murphy

Investigators have found evidence that timing devices were used to detonate the bombs that ripped through Boston Marathon spectators.

Photo of victim Martin Richard now a symbol

A photo of Martin Richard, the 8-year-old boy killed in the Marathon bombing, holding this sign has come to symbolize the tragedy worldwide.

By Evan Allen and Jenna Russell

A photo of the 8-year-old boy killed in the Marathon bombing holding a peace sign has come to symbolize the tragedy worldwide.

Boston Marathon security stayed at high level

Security examined IDs for those seeking access to Dalton Street.

By Andrea Estes, Maria Cramer and Shira Springer

The city’s detailed security plan for the 117th running of the Boston Marathon shows the same all-out mobilization that was in place for last year’s race.

More Stories

Along Marathon route, grief and anger run deep

By Peter Schworm and Lisa Kocian

In deference, Senate, mayoral campaigns halt

By Jim O’Sullivan and Andrew Ryan

Adrian Walker

The reckoning begins in Ashmont

By Adrian Walker

BOSTON

Two are shot at Roxbury intersection

By Melanie Dostis

An uneasy calm in the heart of Boston

By Casey Ross, Beth Healy, Jenn Abelson and Erin Ailworth

Local unions offer $50,000 reward for tips

By Brian Ballou and Martin Finucane

At hospitals, training for disasters put to test

By Liz Kowalczyk, Kay Lazar and Chelsea Conaboy

Kevin Cullen

Answering the call, in all its poignant horror

By Kevin Cullen

Business

Cellphone networks overwhelmed after blasts in Boston

Wireless networks have not handled the sudden increases during disasters like hurricanes and the explosions that rocked the Boston Marathon and its fans on Monday.

By Michael B. Farrell

Wireless networks have not handled increases during disasters like the explosions that rocked the Boston Marathon.

FBI sifting for clues in mountains of evidence

Vancouver officials examined 5,000 hours of video evidence in the riots that broke out after the Boston Bruins beat the Vancouver Canucks in the 2011 Stanley Cup.

By Taryn Luna

Software tools offer limited help to federal agents analyzing thousands of hours of video recordings taken near the Marathon’s finish line.

Dell, Carl Icahn agree on limit on shares

Michael Dell, chief executive of Dell, is seeking to buy the firm he founded for $24.4 billion. Some prominent shareholders, most notably Carl Icahn, are looking for a higher payoff. Icahn has offered a competing bid for the firm.

Dell and the billionaire investor have agreed to cap his stake in the personal computer maker while a committee considers competing takeover bids.

Obituaries

obituary

Famous sports announcer Pat Summerall dies at 82

The understated Pat Summerall (left) was the perfect complement in the broadcast booth to the exuberant John Madden.

By Stephen Hawkins

The NFL player-turned-broadcaster whose deep, resonant voice called games for more than 40 years died Tuesday in Dallas.

Sports

BAA vows Boston Marathon will go on

Runners hugged after picking up their effects at the finish line Tuesday.

By John Powers

It’s unclear how the race will handle the thousands of runners who couldn’t finish Monday, but it’s clear the race will be back next year.

Christopher L. Gasper

Marathon attack removes shield from sporting events

(Top row): Ben Revere of the Phillies remembered Boston; in New York, the Sox-Yankees rivalry was a show of solidarity; Waltham’s Keith Aucoin skates for the Islanders; in Cleveland, the Red Sox were a show of strength; (bottom row) English Premier League players to NHL fans from St. Louis to Phoenix banded together; and the flags at Pittsburgh’s PNC Park were at half-staff.

By Christopher L. Gasper

The idea that sports provide a safe haven from the intractable troubles of the real world was shattered at the Boston Marathon.

Ex-Patriot Joe Andruzzi says he’s not a hero

Ex-Patriot Joe Andruzzi carried an injured woman to safety Monday. “There was just chaos, like a battle scene,’’ he said.

By Greg A. Bedard

The former Patriots guard, whose namesake foundation had 21 runners in the Marathon, was captured carrying an injured woman to safety Monday.

G: Food

Gluten: fact or fad or a bit of both?

A plate of gluten-free chickpea pasta from Rialto in Cambridge.

By Jane Dornbusch

A gluten-free diet is important to millions, but its significance may be overblown.

Dining out

Playful prix fixe at Asta

Braised celery, black garlic gnocchi, and chicken skin.

By Katie Johnston

Asta, which replaced Café 47, is an unorthodox special-occasion restaurant with appealing, unpredictable dishes worth experiencing.

Q&A

First year’s a winner for West Bridge chef

By Glenn Yoder

Food & Wine magazine named co-owner of the new Kendall restaurant, Matthew Gaudet, one of America’s best new chefs.

More Stories

Galleries

What’s up at Boston-area art galleries

By Cate McQuaid

sunday supper

Warming, healthy poached chicken becomes rice bowls

By Karoline Boehm Goodnick

Dance Review

Sleek steps from José Mateo Ballet Theatre

By Karen Campbell

Book Review

‘Odds Against Tomorrow’ by Nathaniel Rich

By Michael Patrick Brady

A Tank Away

Fine lodging, dining in Hartford

By Diane Bair and Pamela Wright

events

Boston-area to do list

By June Wulff

names

Tragedy brings Maria Menounos back home

By Mark Shanahan and Meredith Goldstein

names

SI selects John Tlumacki photo for cover

By Mark Shanahan and Meredith Goldstein

Names

Mark Wahlberg laments the Marathon tragedy

By Mark Shanahan and Meredith Goldstein

names

Celebrities with Boston ties respond to bombings

By Mark Shanahan and Meredith Goldstein

names

Bradley Cooper meets mohawk in ‘American Hustle’

By Mark Shanahan and Meredith Goldstein

Names

Artist John Lurie coming to Coolidge Corner

By Mark Shanahan and Meredith Goldstein

Names

Celebrity scribes at BPL Associates event

By Mark Shanahan and Meredith Goldstein