Kristy Kirkup, a National affairs reporter with The Globe and Mail, reflects on the tragic events of October 22, 2014, when a shooter attacked Parliament Hill, killing Corporal Nathan Cirillo. She discusses the chaos and heroism during that day, the motivations behind the attack stemming from extremist ideologies, and how security measures have evolved since then. Kirkup also shares insights on the psychological impact on witnesses and survivors, emphasizing the importance of remembrance in the face of national tragedy.