It started with a handful of students in Parkland that spoke up after a shooter gunned down 17 of their peers and faculty at their school. Then hundreds joined their cause. They wanted gun control. Now.
Less than a month later, the same group of student activists organized a national walk out to protest gun violence and demand gun reform.
Then, on March 24, students led marches for their lives, in Parkland, in Washington, D.C. and across the world.
What happens next?
For one thing, they aren't slowing down.