Obama warns Russia on Ukraine

‘‘Any violation of Ukraine’s sovereignty and territorial integrity would be deeply destabilizing,’’ President Obama said this afternoon.

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2014/02/28/BostonGlobe.com/Foreign/Images/7803dd2f181c4c0db37c65427c8721df-b7b2093822f849a79a7f09c40c79d6bd-0.jpg Yanukovych declares himself Ukraine’s leader

Fugitive President Viktor Yanukovych spoke at a news conference in Russia, vowing to return to his country.

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2014/01/30/BostonGlobe.com/Metro/Images/e7af1c512f504d8695e22dc0a2da3e93-e7af1c512f504d8695e22dc0a2da3e93-0-9356.jpg Tsarnaev remarks ‘to his detriment’ overheard by FBI

An FBI agent allegedly overheard remarks the alleged Marathon bomber made during a meeting with his sister.

Patriots president Jonathan Kraft.

AP/file

Jonathan Kraft touches on Welker fallout

During the MIT Sloan Sports Analytics Conference, the Patriots president remarked on the team’s acrimonious split with Wes Welker.

“You talk about Groundhog Day. This is Groundhog Year. What are we doing here today? Nothing, nothing,” Senate majority leader Harry Reid said.

Congress back to business but it’s still not working

This week solidified the sense that the looming midterm elections make it almost impossible for compromise.

Jack Parker, who stepped down as Boston University’s hockey coach last year, waved to the student section after his number was retired during a ceremony between the first and second periods of the game against Northeastern University. Standing next to him is his wife, Jacqueline.

BU retires Jack Parker’s number

The hockey coach’s accomplishments include three NCAA championships, 11 conference titles, and 21 Beanpot crowns.

Officials gave a media tour to show the progress of the work on the Callahan Tunnel.

Tunnel on track to reopen by deadline

Officials will know by next week if the Callahan Tunnel will reopen to traffic on March 12 or sooner.

Opinion

LAWRENCE HARMON

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2014/02/28/BostonGlobe.com/EditorialOpinion/Images/Lawrence_Harmon-1607.jpg Bridgewater Hospital death a disgrace

Joshua Messier’s 2009 death has the earmarks of a crime, and it should be investigated accordingly.

Arts

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stage review

Timberly Canale and Mikhail Baryshnikov take a tumble together in ArtsEmerson’s “Man in a Case.”

Baryshnikov adds grace to ‘Man in a Case’

Adapted from a pair of stories by Anton Chekhov, the mixed-media theater piece is a somber and visually striking 75 minutes at the Emerson/Cutler Majestic Theatre.

Movies

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the 2014 Academy Awards

From top: Joaquin Phoenix listening to the voice of Scarlett Johansson in “Her” and Sarah Paulson in “12 Years a Slave.”

Overlooked by Oscar

Ten instances where the Academy of Motion Picture Arts and Snubs (er, Sciences) overlooked a worthy nominee from last year.