Police officers walk the scene in the Greektown neighborhood of Toronto on Sunday night. Police say a gunman opened fire on people in a restaurant. Three people are dead including the gunman, police reported.
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Some firefighters, paramedics and police officers say the tragedies they respond to haunt them, leading to depression, job burnout, substance abuse, and more.
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Susan Nelson, author and public speaker on brain injury awareness and gun safety, at her home in Austin, Texas. Nelson survived a point-blank gunshot to the head in 1993.
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Demonstrators march toward Las Vegas City Hall during the March for Our Lives rally last month in Las Vegas, where 58 people were killed in an October 2017 mass shooting.
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