its colorado,you can bet your ass someone in there was armed,its a huge CC state, which proves my point even more that without proper law enforcement training and living in a world where your fully expecting to have to defend yourself, a gun wont do shit to protect you.
and in my opinion in a robbery situation would be more likely to get your ass shot by a criminal who is armed but had no intention to kill,just intimidate.
weapons just escalate the situation and you better be proficient if you bring yours out. criminals are.