Fifteen-year-old Eden Hebron had never lobbied Congress before last Thursday—and before February 14, when three of her classmates were murdered in her classroom at Stoneman Douglas High School in Parkland, Florida, she’d never really shared her political opinions at all. But, like manyof her fellow student survivors, Hebron’s first-hand experience with devastating gun violence had finally brought her to Washington, where she spoke with federal lawmakers about sponsoring the gun control legislation that currently lays dormant in Congress.