Thousands of students walked out of their schools in a nationwide demonstration, one month after a gunman killed 17 people at a high school in Florida.
The protests are intended to pressure Congress to approve gun control legislation after the massacre in Parkland.
The walkouts started at 10 a.m. local time in each time zone and lasted 17 minutes, one minute for each of the Parkland victims.
An estimated 185,000 people in 50 states were expected to join the walkouts, with around 3,100 schools planning to participate.
In New York, students marched in the streets, while in Washington, sign-clutching students gathered outside the White House and on Capitol Hill.
In Chicago, like many students across the country, high schooler Sheryl Orgyez asks, “how many more lives lost will it take for the government to create reforms?”
Since the shooting, Florida has raised the minimum age to purchase a firearm to 21 years old and extended the waiting period to three days.