On Feb. 14, 2018, David Hogg was in his AP Environmental Sciences class at Marjory Stoneman Douglas High School in Parkland, Fla., when he heard gunshots. It was the beginning of one of the deadliest school shootings in American history.
A janitor directed Hogg and several other classmates to hide in a closet. Not knowing if he'd make it out of the classroom alive, Hogg leaned on what he had learned in his TV production classes, and began recording with his phone.
