Chủ Nhật, 18 tháng 11, 2018

NPR News: Inside The Business Of School Security To Stop Active Shooters

Inside The Business Of School Security To Stop Active Shooters
Schools in the U.S. have spent billions of dollars on systems to stop shooters. Washington Post reporter John Woodrow Cox says it's not clear how effective these measures can be.

Đọc tiếp trên NPR
At November 18, 2018 at 07:04AM
Categoty Education

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