Marathon bombings

Potential psychological explanations behind bombings

Pictured at left, Marathon bombing suspects Dzhokhar and Tamerlan Tsarnaev. At right: Lee Boyd Malvo saw John Allen Muhammad as a father figure. There are some similarities between the Washington, D.C., snipers and the Tsarnaev brothers.

Left: Bob Leonard/AP; Right: Sheila Tezano/Polaris/AP

Psychologists say there are some similarities between Washington, D.C., snipers Lee Boyd Malvo and John Allen Muhammad, and the Tsarnaev brothers.

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2013/04/29/BostonGlobe.com/Business/Images/suspects2-2077.jpg Facial-recognition software precision may be years away

It took eyeballs, not microchips, to identify Dzhokhar and Tamerlan Tsarnaev, the two Marathon bombing suspects.

Zubeidat Tsarnaeva, the mother of the two Boston bombing suspects, spoke at a news conference inf Dagestan, Russia, on   April 25.

Mother of bomb suspects insists sons are innocent

‘‘I’m sick and tired of all this nonsense that they make up about me and my children,” Zubeidat Tsarnaeva said.

Mike Jefferson (left) who ran the Marathon, with Paul Norden at Beth Israel Deaconess Hospital.

Friends wounded at Marathon will recover together

Five badly hurt Stoneham men and the Marathoner friend they cheered for face a long path ahead in solidarity.

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College for America student Ashley Collins (left) danced with Rachel Marshall and Shane Shaw at one of her three jobs.

Traditional ways upended in college of competence

A new program demolishes one of the most fundamental building blocks of college: course credit.

Sports

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