The father of Lingzi Lu, Jun Lu, second from right, and her aunt Helen Zhao, right, observe a moment of silence with the family of Martin Richard, foreground from left, Bill, Jane, Henry and Denise, center, during a ceremony at the site where Martin Richard and Lingzi Lu were killed in the second explosion at the 2013 Boston Marathon, Sunday, April 15, 2018, in Boston. (AP Photo/Michael Dwyer)
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