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NEW YORK — Within five days, there have been three fatal crashes in New York City.

The youngest victim, 3-year-old Bertin DeJesus, was killed in East Harlem Monday while crossing the street with his mother.

Dana Lerner, another local mom who knows what it’s like to lose her son in a tragic way, is fighting to make streets safer for all.

Lerner’s 9-year-old son, Cooper, was struck and killed by a cab driver on the Upper West Side five years ago.

She created a non-profit organization,, where she actively seeks to change the laws and driver behavior.

Lerner is also founding member of Families For Safe Streets, whose peer support network provides crash victims and bereaved families support.