Run? Hide? Fight? Lockdown? Two U.S. school shootings highlight differing responses

In two U.S. school shootings within eight days, students have attempted to tackle the shooters, sometimes at the cost of their own lives, drawing praise for reducing the bloodshed by taking a step that experts agree should only be a last resort.

from Reuters: U.S. https://reut.rs/2Lykocz
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