Photos: Students Walk Out to Protest School Shootings, Gun Violence

Across the nation, at 10 a.m. in local time zones, students walked out of classrooms for 17 minutes to protest gun violence. Each minute represented one victim from the deadly Marjory Stoneman Douglas High School shooting in Parkland, Florida, which happened exactly one month ago, on February 14. During that shooting, a former student killed 17 former classmates and staffers.

Schools have been the sites of some of the deadliest shootings in modern U.S. history, and at the site of the shooting in Parkland, students gathered at the football field as crowds cheered for those who left campus.

In Washington, D.C., thousands gathered and headed toward the White House and Capitol. Popular cheers included "Hey, hey, NRA, how many kids did you kill today?" and were echoed during many rallies.

Here is a roundup of tributes paid nationwide:

Adam Alhanti hid in the Parkland school's band room during the shooting. He said that he would march "because I want the NRA to fear the vibrations of the people's stomps across the nation."

In Newtown, Connecticut, where the Sandy Hook Elementary School shooting occurred in 2012, students assembled outside and held signs that read, "Protect Our Kids."

The scene from Jackson High School in Massillon, Ohio:

In the aftermath of the Parkland shooting, students have confronted Capitol Hill's stalled efforts to address America's gun violence epidemic. Their reaction has started a nationwide debate, and a series of rallies have sprung up in schools from California to Florida, with frustration voiced over the lack of change.

Earlier this month, Senate Minority Leader Chuck Schumer told CNN that he had never seen anything like this. "Don't underestimate the power of these kids," he said.

Photos: Students Walk Out to Protest School Shootings, Gun Violence | U.S.