Something I've been munching over as I've read this thread, and thought awhile about is the importance of getting a long arm into play.
I've read about some LE deaths in shootouts and keep coming back to the thought of
"If that poor guy could have gotten his patrol carbine or riot gun working, he might have came out alive."
Therefore, I suppose situational awareness is critical in that if you can anticipate the situation prior to shots being fired, perhaps you can achieve the critical edge and bring your long arm into play.
NRA Life Member
Ladyfriend: "I need help with the leaves in the yard"
Me: "Controlled burn?"
LadyFriend: "I forgot my Boy Scout turned into an infantry officer."