Win At Life said:
My synagogue has one front door and a hallway that is monitored by a CHL during the service. We have so many people carrying that if anyone started something, a very real concern is that we might hit one another in the crossfire.
This is where we ask the ones that we know are carrying to attend training sessions. While training is mostly shooting and firearm handling type stuff - with some general procedure things thrown in - it at least gives us an idea who is carrying and who isnt, and what their capabilities are. I strongly encourage churches - especially small churches - to at least do this with men you trust. You can also contact your local sheriff or police to help do this if you dont have a qualified member. I know our local sheriff - who is a church member - has been a big help to us and other congregations.
For larger congregations, there are consultants out there who specialize in this stuff that are incredible resources to other congregations. The head of security at Prestonwood in Plano is one that I know of.
On a side note - we also have confronted anyone open carrying and asked they not do that on campus. Most agree but one dude got pissy about it and left. Oh well.