March for Our Lives demonstration in New York

Marchers hold American Flags at the March for Our Lives demonstration in New York City on March 24, 2018. New York City. Hundreds of thousands of kids and adults across the country are expected to participate in rallies Saturday as part of the March for Our Lives movement that was born out of the Valentine's Day school shooting in Parkland, Florida, that killed 17 students and staff members. Photo by John Angelillo/UPI