I recently began exercising my 2nd amendment rights by purchasing a g17 rtf2. I am currently practicing my marksmanship at the local range before I go get my ccw. In addition to being able to use my firearm for defense, I want to train myself so I wont need to use it. I have heard a term called situational awareness but I am not sure what it means. Also I am curious on how does one go about spotting ccer's and plain clothes cop/security?