Boston

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Boston Celtics' Jeff Green (8) drives past Charlotte Bobcats' Michael Kidd-Gilchrist (14) in the second quarter of an NBA basketball game in Boston, Friday, April 11, 2014. (AP Photo/Michael Dwyer)

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Charlotte Bobcats' Gerald Henderson (9) drives past Boston Celtics' Avery Bradley (0) as the Bobcats' Josh McRoberts (11) looks on in the second quarter of an NBA basketball game in Boston, Friday, April 11, 2014. (AP Photo/Michael Dwyer)

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People sign the America 4 Prayer Canvas in support and remembrance of the 2013 Boston Marathon bombing victims and survivors at the Statehouse in Boston, Friday, April 11, 2014. (AP Photo/Elise Amendola)

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People sign the America 4 Prayer Canvas in support and remembrance of the 2013 Boston Marathon bombing victims and survivors at the Statehouse in Boston, Friday, April 11, 2014. (AP Photo/Elise Amendola)

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ADVANCE FOR USE SATURDAY, APRIL 12, 2014 AND THEREAFTER - FILE - In this April 22, 2013 file photo, Boston Mayor Thomas Menino, recovering from a broken leg, pauses at the site of the first bombing near the Boston Marathon finish line on Boylston Street in Boston. Three people were killed and more than 260 were injured in two bomb blasts on April 15, 2013. Now-retired, as mayor he rallied the city over the following year to help Boston move past it. (AP Photo/Robert F. Bukaty, File)

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ADVANCE FOR USE SATURDAY, APRIL 12, 2014 AND THEREAFTER - FILE - In this June 19, 2013 file photo, Boston Marathon bombing victim Marc Fucarile waves a "Boston Strong" flag with his fiancee, Jen Regan, and their son, Gavin, partially obscured, before Game 4 of the NHL hockey Stanley Cup Finals between the Boston Bruins and the Chicago Blackhawks in Boston. (AP Photo/Elise Amendola)

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ADVANCE FOR USE SATURDAY, APRIL 12, 2014 AND THEREAFTER - FILE - In this April 15, 2013 file photo, medical workers aid injured people near the finish line of the 2013 Boston Marathon following two bomb explosions in Boston. In the course of a year, limbs have been replaced, psyches soothed, the wounds sustained in a moment at the marathon’s finish line have at least begun to heal. At the same time, a city shaken by an act of terrorism has returned to its usual rhythms - sadder, but some say stronger, as well. (AP Photo/Charles Krupa, File)

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ADVANCE FOR USE SATURDAY, APRIL 12, 2014 AND THEREAFTER - In this Tuesday, March 11, 2014 photo, Boston Marathon bombing survivor Roseann Sdoia drives back to her apartment in the North End neighborhood of Boston, following a therapy and training session. At home, she must climb the almost 20 stairs of the old building in the historic Boston neighborhood. (AP Photo/Charles Krupa)