Regarding "School knifing and guns" [Letters, April 13], two readers said that a Pittsburgh-area stabbing spree demonstrates that gun control is unnecessary, because determined people will always find a way to do harm.

It's a shame that this has to actually be pointed out: Knives have a multitude of uses. Most are benign. Guns, particularly assault rifles, have only one use: to kill as many people as possible in the shortest amount of time.

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If the 16-year-old stabber had an assault rifle, chances are these would have been all fatalities, not wounded kids.

Russell Alexander, Brentwood