If you're unsure what you can bring in carry - on as opposed to checked luggage, read up on the list of prohibited items. (rocketlawyer.com)
The work description of a security guard also entails ensuring that visitors do not come into the premises with prohibited items and weapons. (jobdescriptionandresumeexamples.com)
Search carry - on or checked baggage by hand when it is suspected to contain prohibited items such as weapons. (jobhero.com)