1.All guns are always loaded.
2.Never point the gun at anything you are not willing to destroy.
3.Keep your finger off the trigger until your sights are on target (and you have made the decision to shoot).
4.Be sure of your target and what is beyond it.
Admittedly may have been before they became federalized and therefore automatically professionalized. ...... and I got no citation for exactly who, or when.A man from Colorado had a "4-inch milk chocolate pistol wrapped in plastic wrap" in his luggage; a gift from his daughter. The screener said, "I don't care if it's chocolate, you're not taking a gun on the plane." Even the passenger eating the "barrel" did not satisfy the ever-vigilant security dweeb. No "gun parts" were permitted, either! Only after eating the rest of the "gun" was the man permitted past the checkpoint.