Law enforcement officers block off the entrance to Marjory Stoneman Douglas High School, on Feb. 15, 2018 in Parkland, Fla. A day earlier a gunman opened fire in the school.

Law enforcement officers block off the entrance to Marjory Stoneman Douglas High School, on Feb. 15, 2018 in Parkland, Fla. A day earlier a gunman opened fire in the school.