>>
>>That could be a very interesting question to ask directly of the NRA: "How many shooting incidents in the last X years were ended by armed members of your organization, who were not trained professionals acting in the course of their regular duties?"
>
>I'm sure they wouldn't dodge the question as they have run a column in National Rifleman since 1958 addressing exactly that question
>
>
>http://www.nraila.org/armedcitizen/
>
>http://www.old-yankee.com/rkba/armcit/
>
>Of course this isn't objective but I assume all the facts stated are checkable and I don't ever remember anyone "exposing" their making it all up and I'm sure in 52 years somebody would have if that were the issue.

Thanks for the links - I looked for something like that earlier on the NRA site but couldn't find anything.

Searching on the keyword "mass" gives a bunch of hits but most seem to be basically self-defense. On an admittedly brief scan, I didn't see any cases where an armed citizen, acting as a third party, ended an incident.