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20 abr 1999 año - April 20: Most Deadliest School Shooting in US

Descripción:

Columbine HS students killed 15 & wounded 23 ppl -> stricter safety procedures, but school shootings freq. is alarming.

Añadido al timeline:

1990s Timeline Part 2

ByJulie Berichon

8 may 2019

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0

309

fecha:

20 abr 1999 año

Ahora mismo

~ 26 years ago

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