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Ryan Petty, father of 14-year-old Alaina, who was killed in last year's Parkland school shooting, and Coni Sanders, the daughter of a teacher who was killed at the Columbine School Shooting in 1999, talk about how to help survivors of similar tragedies. In recent weeks two survivors of the Parkland shooting and a father of a victim of the Sandy Hook school shooting have reportedly taken their own lives.

(Picture: A emergency services worker wipes away tears at the memorial garden outside of Marjory Stoneman Douglas High School 14th February 2019 in Parkland, Florida, on the one year anniversary of the shooting at the school. Credit: Joe Cavaretta/South Florida Sun Sentinel/TNS/Getty Images)