In this courtroom sketch, Dzhokhar Tsarnaev (center) is depicted between defense attorneys Miriam Conrad (left) and Judy Clarke during his federal death penalty trial on March 5. Jane Flavell Collins/AP hide caption

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Azamat Tazhayakov, left, Dias Kadyrbayev, center, and Robel Phillipos, right, college friends of convicted Boston Marathon bomber Dzhokhar Tsarnaev, sit during a hearing in federal court in Boston in May 2014. Jane Flavell Collins/AP hide caption

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Judy Clarke and David Bruck, Dzhokhar Tsarnaev's defense attorneys, leave the Moakley federal courthouse on April 8 after their client was found guilty. John Blanding/The Boston Globe via Getty Images hide caption

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Martha and Alvaro Galvis used to travel from New Hampshire to Boston to watch the marathon every year. Both were hurt in the bombing two years ago. Jesse Costa/WBUR hide caption

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Marathon Bombing Survivors Face A World That Still Feels Out Of Control

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A memorial at the site of the first explosion in the Boston Marathon bombing. Defense attorneys say too many people in the potential jury pool have some kind of personal connection to the case. Andrew Burton /Getty Images hide caption

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Accused Bomber's Lawyers Say Boston Jury Pool Is Too Biased

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Boylston Street's 26-mile marker will be a welcome sight to the thousands of runners who are in today's Boston Marathon. Today marks the 118th running of the race. Jared Wickerham/Getty Images hide caption

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Blue and yellow are the colors for tributes to victims of the Boston Marathon. Street lights on the route of this year's race are among the places they're showing up. Andrew Burton/Getty Images hide caption

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Carol Downing is still haunted by memories of last year's marathon. But she's excited about reuniting with other survivors. Michael Dwyer/AP hide caption

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Despite Worries, Boston Survivor Heads Back To The Start Line

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Boston bombings suspect Dzhokhar Tsarnaev on April 19 as he emerged from a boat stored in a Watertown, Mass., backyard. The red dot of a police sharpshooter's laser sight can be seen on his forehead. Mass. State Police Sgt. Sean Murphy/Boston Magazine hide caption

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Boston bombings suspect Dzhokhar Tsarnaev on April 19 as he emerged from a boat stored in a Watertown, Mass., backyard. The red dot of a police sharpshooter's laser sight can be seen on his forehead. Mass. State Police Sgt. Sean Murphy/Boston Magazine hide caption

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Boston bombings suspect Dzhokhar Tsarnaev emerges from a boat stored in a Watertown, Mass., backyard on April 19. The red dot of a police sharpshooter's laser sight can be seen on his forehead. This is among the images that Massachusetts State Police Sgt. Sean Murphy gave to Boston Magazine. Mass. State Police Sgt. Sean Murphy/Boston Magazine hide caption

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Boston bombings suspect Dzhokhar Tsarnaev on April 19 as he emerged from a boat stored in a Watertown, Mass., backyard. The red dot of a police sharpshooter's laser sight can be seen on his forehead. Mass. State Police Sgt. Sean Murphy/Boston Magazine hide caption

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