This one made the rounds earlier last week, but I thought I'd still share it.
Indiana pastor pulls gun on man, stops robbery
A lot of folks sometimes ask how, as a Catholic, I can reconcile using a gun to defend my life. Here is what the Catholics are taught about self defense:
Catechism of the Catholic Church (specifically the section entitled "Legitimate defense")
Note that it sounds similar to the law that is codified in today's society.