Today is National School Walkout Day, when students across the country are taking action to change the country’s gun laws. The students chose April 20 as the date of this event because it marks the anniversary of the 1999 Columbine High School massacre in which two students murdered 13 people and injured 24 more. 

After the shooting at the Marjory Stoneman Douglas School in Parkland, Florida in February of this year, survivors have banded together with students from across the country with unprecedented energy to advocate for gun reform. Today is already the second school walkout planned just this year for this same purpose. Other efforts include March for Our Lives, a massive rally with events concentrated in Washington, D.C. that spread throughout the country, as well as a town hall meeting with politicians and NRA representatives nationally broadcast on CNN. 

The movement is not advocating for the seizure of all guns. Instead, the students have a carefully constructed list of demands that would help make communities across the country safer in the face of the country’s gun violence epidemic. These demands include universal background checks, bans on assault weapons, high-capacity magazines, and bump stocks, as well as digitizing gun records. 

To learn more about what these demands really mean—and why they've been difficult to implement despite widespread support—check out the video above.