More than 500,000 people led by the students from Marjory Stoneman Douglas High School in Parkland, Fla. are marching on Washington, D.C. to send a message to lawmakers. They want gun control now and will settle for nothing less.

The school massacre took 17 lives and energized a movement to ban the sale of assault style weapons, which have been used in every mass shooting.

Hundreds of thousands of kids and adults have swarmed Washington D.C., demanding gun control in the wake of the Parkland massacre.

Millions more are marching in rallies in an estimated 800 cities across the country and around the world

Miley Cyrus, Common, Demi Lovato, Lin-Manuel Miranda, Ariana Grande and Jennifer Hudson are performing at the D.C. rally, but only students will deliver messages.

The students have all gone through some kind of trauma involving gun violence.

Check out the live stream above.