Senior David Hogg, who survived yesterday's school shooting in southern Florida, stared straight into CNN's camera Thursday morning and sent a strong message to President Trump and lawmakers: “Please, take action. Ideas are great… But what’s more important is actual action… that results in saving thousands of children’s lives. Please, take action.”

Why it matters: Yesterday's shooting in Parkland joins Las Vegas and Sutherland Springs as one of the deadliest mass shootings in modern American history. All of them took place in the last five months.