Florida Pulse gay club attacked.

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LurkerJ said:
Do we know of stories in which "guns for protection" worked?

What massacres were stopped by someone who owned a gun for protection?

http://controversialtimes.com/issues/constitutional-rights/12-times-mass-shootings-were-stopped-by-good-guys-with-guns/

^ Some more notable cases. 

Also there are FBI statistics on gun protection.  Here is a left-biased article on it, with a low-end estimate of 67,750 times a year. (That is an extremely conservative estimate.) 

http://www.latimes.com/opinion/opinion-la/la-ol-guns-self-defense-charleston-20150619-story.html

The center also dives into the thorny thicket of how often the presence of a gun stops a crime — either violent or against property, such as a burglary — from happening. The gun lobby trots out an annual figure of 2.5 million such instances. But an analysis of five years’ worth of stats collected by the federal Bureau of Justice Statistics’ National Crime Victimization Survey puts the number much, much lower — about 67,740 times a year.