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On Valentine’s Day, a shooter opened fire inside Marjory Stoneman Douglas High School in Parkland, Fla., killing 17. Many commentators and experts have tried to grapple with the tragic events of that day. Among them was É«ÏãÊÓƵ’s Dr. Elizabeth Englander, professor of psychology and the founding director of the Massachusetts Aggression Reduction Center.

She was interviewed on Radio Boston, which is produced by WBUR, Boston’s National Public Radio affiliate.