In reply to XDm45,
I never recommend to any of my students taking measures like carrying an empty chamber. If there is a safety concern buy a solid, safe rig. You should already have a gun that is safe and functional, if carrying a condition 1 glock worries you then carry a weapon with an external safety in condition 1.
Carrying a firearm without a round in the chamber can be a detriment to your safety, and after you are stabbed to death, that attacker will then have a gun to go complete attacks with in the future.
Also sometimes I reference weapons conditions (USMC/There are 4 in ALL) as applied to handguns:
Condition 1 (or RED): Magazine inserted, round in chamber, slide forward, weapon on safe
Condition 2: Does not apply to most of our weapon systems
Condition 3 (or YELLOW): Magazine inserted, no round in chamber, slide forward, weapon on safe
Condition 4 (or GREEN): No Magazine inserted, no round in chamber, slide forward, weapon on safe