Robin Campbell, a PhD candidate at Dalhousie University with research focused on the mental health of volunteer firefighters, participates in a roundtable session dealing with the needs of first responders after serious incidents, at the Mass Casualty Commission inquiry into the mass murders in rural Nova Scotia on April 18/19, 2020, in Halifax on Thursday, June 30, 2022. Gabriel Wortman, dressed as an RCMP officer and driving a replica police cruiser, murdered 22 people. THE CANADIAN PRESS/Andrew Vaughan