Brown takes key step toward N.H. Senate run

Scott Brown announced he has formed an exploratory committee to prepare for a US Senate run in New Hampshire at an event in Nashua, N.H., on Friday.

Gretchen Ertl/REUTERS

“We look forward to meeting you and to this great journey ahead,” Scott Brown said in announcing an exploratory committee.

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2014/03/13/BostonGlobe.com/Metro/Images/15mbta.jpg Driver in trolley derailment fired

Investigators found that the Green Line trolley derailment that injured 10 people Monday was a result of human error.

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2014/03/14/BostonGlobe.com/Foreign/Images/b37b0ae952024ff09a9338d8a8d6dd17-b37b0ae952024ff09a9338d8a8d6dd17-0-1755--90x90.jpg After talks, US and Russia still far apart on Crimea

Russia’s foreign minister said there was ‘‘no common vision’’ between the countries on Crimea’s impending secession vote.

Members of the University of Rhode Island and MIT teams maneuvered near the ice as Tufts hosted the New England Team Race Regatta in front of the MIT Sailing Pavilion in the Charles River.

Pat Greenhouse/Globe Staff

Photo gallery

Globe photos of the week

Sailboats navigated the icy Charles River, a 5-year-old boy showed off his boxing moves in South Boston, and more of the week’s best images.

Royal Malaysian Air Force navigator captain, Izam Fareq Hassan, marked locations on a map during a search and rescue  operation to find the missing Malaysia Airlines.

Piracy, suicide eyed in jet’s disappearance

The latest evidence suggests the plane didn’t experience a catastrophic incident over the South China Sea as was initially suspected.

Opinion

Will Mass. legalize marijuana before happy hour?

The differing prospects of happy hour and marijuana speak volumes about the political and cultural climate in Massachusetts.

NFL NOTEBOOK

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2014/03/14/BostonGlobe.com/Sports/Images/2d36a2aad0e541919978e1794e543462-894a34acf25549e1bf2f8ddd1615fbec-4-14559.jpg Report: Julian Edelman to visit 49ers

The free agent wide receiver has drawn interest from several teams.

Police to increase presence at South Boston parade

Parade-goers are being urged not to bring bags to the parade as more uniformed and undercover officers will be deployed, along with the bomb squad.

Opinion

SCOT LEHIGH

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2014/02/14/BostonGlobe.com/EditorialOpinion/Images/lehigh.jpg Duncan says Mass. can’t be complacent about education

Secretary of Education Arne Duncan has a message for Massachusetts: Yes, education reform has been a success here, but we still have a long way to go.

Nation & World

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Former police officer Curtis Reeves is charged with murder.

Defendant in theater shooting was texting too, records show

A former police officer accused of killing a man in a dispute over texting had used his own phone to send a message.