"What are you going to do if someone attempts to rob this bank; you don't even carry a gun," asked a customer. I replied, "I'm skilled and trained with other defense options." But I was thinking to myself, "A phone is my only line of defense. So, I'm going to be the first person out the door. And I'll observe and report from the parking lot." I am merely preventive maintenance. A security guard's job is to remain visible as a deterrent to criminals or undesirables. The guard's eyes and ears must always remain alert for suspicious activities and sounds.