From someone who used to go to a mega church, and still goes on occassion when I have time to, there were security guards, but I can't remember if they were armed or not.  And the ones wearing uniforms were outside the church, anyone inside was in plain clothes and very inconspicuous, and probably unarmed.  I think most of them were off duty Planp Police, and Denton Co. Sheriff Deputies that volunteered their time or might have actually been church members. As you said the world is crazy today, and this is not the first such incident to happen in recent history. Remember the church in Fort Worth, ( not anywhere near as big as the one that got struck this past Sunday) where a guy came in durin a Wed nite youth service and started shooting people.  Remember the two kids at Columbine High. It was known that they targeted some kids because they knew they were Christians. Remember the words to Cassie Burnall, "Do you blieve in God?...Why?"  BOOM!  Some people are very disturbed and "hate" God, Christians, the Church as a whole, etc, and will target such a place.  So unfortunately, especially a large church, which could also be a target for terrorism because of its size, the need for such security exists. I think it says more about the world we live in than it does about the church itself.  I think it is more evidence that we are living in the final days of history as we know it and our Lord's coming is soon.