Afghanistan, US remain at impasse over security deal

Afghanistan’s president reaffirmed his refusal to sign a security deal, and National Security Adviser Susan Rice said that would prompt the US to start to plan to pull out its forces after 2014.

Lantigua concedes in Lawrence mayoral race

Lawrence Mayor William Lantigua conceded defeat today on a Spanish-language radio talk-show, two days after a recount showed he was defeated by 81 votes.

Connecticut State’s Attorney/associated press

A rifle in the master bedroom at Adam Lanza’s house.

Connecticut State’s Attorney/associated press

Adam Lanza’s bedroom.

Connecticut State’s Attorney/associated press

A drawer with bullet clips is seen at Lanza’s house.

Connecticut state police/getty images

Firearms and ammunition found on or near Lanza’s body at the school.

Connecticut state police/getty images

An image of the front entrance of the school.

Connecticut state police/getty images

A Glock 20 found near Lanza in Room 10 at Sandy Hook.

Associated press

An undated photo from Western Connecticut State University of Adam Lanza.

Connecticut State’s Attorney/associated press

Video games at Lanza’s house.

Connecticut State’s Attorney/associated press

A shotgun in Lanza’s the trunk of Lanza’s car at the school.

Newtown massacre report unable to determine motive

Investigators found no clear indication why Adam Lanza chose Sandy Hook Elementary School for his rampage that left 20 students and six educators dead.

Torey Krug scored just 34 seconds into overtime.

Jim Davis/Globe Staff

Bruins 4, Penguins 3 (OT)

Bruins edge Penguins in overtime

Defenseman Torey Krug notched his seventh goal of the season as the Bruins won their second consecutive game in overtime, 4-3.

Gerald Wallace handled the ball against Anthony Tolliver of the Bobcats.

Celtics 96, Bobcats 96

Celtics top Bobcats for second straight win

Gerald Wallace had a season-high 17 points as the Celtics used a 19-3 first-half run and led nearly the entire way.

exclusive tuesday preview | Matthew Gilbert

Smeshies are just human nature

Word invention has reached a fever pitch in our culture, as neologisms and new “smeshies” seem to go viral on a daily basis.

exclusive tuesday preview | Frame by Frame

Titian’s ‘Europa’: ecstasy and terror

“Europa” is the centerpiece of the Isabella Stewart Gardner’s Titian Room, and really of the whole museum.

Opinion

JAMES CARROLL

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2013/11/24/BostonGlobe.com/EditorialOpinion/Images/james_carroll_150px-1385.png What happened to McCain and Kerry’s relationship?

John McCain recently called John Kerry “a human wrecking ball,” but the two once enjoyed an alliance that became a friendship.

Sports

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Patriots 34, Broncos 31 | OT

Stephen Gostkowski celebrated after drilling the game-winning kick.

Patriots stun Broncos in OT after historic rally

Down by 24 when the second half began, the Patriots staged a comeback that ended in another Tom Brady win over Peyton Manning.

Arts

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Photography Review

“Birch, East Branch of the Penobscot.”

Thoreau didn’t photograph Maine, but Scot Miller did

The literary and environmental legacy of Henry David Thoreau is evident in the photography exhibit “Thoreau’s Maine Woods: A Journey in Photographs with Scot Miller.”