Salli Garrigan was in music class when the sound of bullets reverberated through the halls of her high school.
She ran. Out of class, down the stairs, past the shattered front doors of Columbine High.
She survived. But 12 of her classmates did not.
Garrigan, now 35 and an Arlington, Virginia resident, stood Friday before a crowd of D.C.-area students gathered on the U.S. Capitol lawn and told them when she was their age, she didn't know how to make her voice heard.
She didn't know if her perspective as a school shooting survivor would matter to anyone.