The Michigan State University community is in mourning after a mass shooting on campus Monday in which a gunman killed three students and severely wounded five more. In response to Monday's killings, both Michigan Governor Gretchen Whitmer and President Joe Biden have called for tighter gun laws to restrict the purchase of weapons. Monday's bloodshed came just a day before the fifth anniversary of the 2018 mass shooting at Marjory Stoneman Douglas High School in Parkland, Florida, highlighting the ever-present risk of gun violence in the lives of young people in the United States. "Young people now experience gun violence multiple times throughout our lives," says gun violence prevention advocate Robert Schentrup, whose sister Carmen was killed in the 2018 Parkland massacre. We also speak with pediatrician Dr. Mona Hanna-Attisha, who teaches at Michigan State and says gun violence must be seen as a public health crisis. "The number one killer of children is guns," says Dr. Hanna-Attisha.