NEWTOWN, Conn. (CBS/AP) -- A man opened fire Friday inside the Connecticut elementary school where his mother worked as a teacher, killing 26 people, including 20 children, by blasting his way through two rooms as youngsters cowered helplessly in the building. The gunman killed himself and another person was found dead at a second scene, bring the toll to 28, authorities said.
The city of Houston has produced a video on the three key steps to surviving a mass shooting, click here to watch.
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