Lori Rozsa Moriah Balingit William Wan Mark Berman The Washington Post

A heavily armed 19-year-old who had been expelled from a South Florida high school opened fire on campus shortly before classes let out Wednesday, killing 17 people while terrified students barricaded themselves inside classrooms, police said.

A heavily armed 19-year-old who had been expelled from a South Florida high school opened fire on campus shortly before classes let out Wednesday, killing 17 people while terrified students barricaded themselves inside classrooms, police said.