In this March 14, 2018 file photo, demonstrators raise their fists in the air during a student-led march against gun violence at the Civic Center Plaza in San Francisco.
In this March 14, 2018 file photo, demonstrators raise their fists in the air during a student-led march against gun violence at the Civic Center Plaza in San Francisco.
In this March 14, 2018 file photo, demonstrators raise their fists in the air during a student-led march against gun violence at the Civic Center Plaza in San Francisco.