Jack Wilson repeated over and over in all interviews,that not only do you need to be armed,but well trained to use it.
The only way to do this is to practice properly ,and do it often.Dee and other peace officers know this and those of us that served do as well.
I shoot weekly during the summer,and at least once a month during the winter months.Also being observant of things going on around you is equally important.
This guy in Teas made that part of it pretty obvious. He was wearing a trench coat, and had a false beard and wig.Security was watching him from the git go.
I don't think of myself as a staunch Republican or Democrat.
I am a Christian and a Conservative...........In that order!