Jordan Riger, 22, uses her laptop to track attendance for a weekly meeting of Students for the Second Amendment at the University of Delaware in Newark, Del. She sees firearms as tools for self-defense.
Hansi Lo Wang/NPR
A flag flies at half mast at the entrance to Marjory Stoneman Douglas High School, following a mass shooting at the in Parkland, Fla., school earlier this month.
Carlos Garcia Rawlins/Reuters