After a warning on the school intercom, a gunman with an AR-15-style rifle killed a teacher and a student while others jumped from windows
By Nouran Salahieh, CNN As a 19-year-old gunman walked through the St. Louis high school’s hallways with an AR-15-style rifle and over 600 rounds of ammunition, frightened students and teachers locked classroom doors and huddled in corners. Some heard gunshots — and someone trying to open the doors, they recalled. People jumped from windows. The
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