Interesting story...won't get much play though..
https://www.lifezette.com/polizette/neighbor-ar-15-stops-knife-attack-assailant-captured/
Good guys with guns stopping bad guys with all kinds of lethal weapons are far from rare in the U.S. A Jan. 5, 2016, analysis by the Daily Caller News Foundation of crime data found at least 283 victims saved by gun-wielding good guys in the period between July 2014 and July 2015.
https://www.lifezette.com/polizette/neighbor-ar-15-stops-knife-attack-assailant-captured/