Ah, the power of youth. Today, students from over 3000 schools across the country staged a national walkout to protest gun violence, and to urge policymakers to change our gun laws. At 10 am, young people left their desks to take a stand for 17 minutes (one minute for each life taken in the Parkland shooting), using their voices and some powerful signs to make a statement. Click through for the most moving images of the day.

[Photo via @armandaviram]