FILE - In this April 17, 2013 photograph, flowers and signs adorn a barrier, two days after two explosions killed three and injured hundreds, at Boylston Street near the of finish line of the Boston Marathon at a makeshift memorial for victims and survivors of the bombing.  A federal appeals court has overturned the death sentence of Dzhokhar Tsarnaev in the 2013 Boston Marathon bombing, Friday, July 31, 2020, saying the judge who oversaw the case didn't adequately screen jurors for potential biases.    (AP Photo/Charles Krupa, File)
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