People and things are protected by private security. In Riverside, CA, all security guard services officers must go through basic training so they can better understand security and emergency needs. In the US, they'll need more training to carry batons, rifles, and pepper spray (e.g. the Bureau of Security and Investigative Services in California has requirements that a licence for each item listed must be carried while on duty).
For unique duties, some policemen must be certified. Security guards often walk around. Guard tour patrol systems call for patrols to be done regularly and reported. Mechanical clocks had a key that was used to punch a number into a strip of paper that showed the time. Armed security guards (U.S.) protect places like banks, government buildings, military bases, and nuclear power plants. Less private armed security is found in Europe and other wealthy places. Armed security made up mostly of former soldiers is often used to protect corporate assets in developing countries, especially in war-torn areas. Some courts are given the job of running security guards and putting limits on what they can do, especially when they are protecting public places like transit terminals. When they are not on duty, police officers work as night guards and bodyguards.
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