Can I leave security and then go back through security at the Chicago O Hare airport during my layover?

I will have a longer layover at the O Hare airport on Sept 11. I have a friend who lives in Chicago who would like to possibly meet me for a drink. I know he won t be able to meet me at the terminals, but can I meet him on the other side of security and then go back through security to catch my connecting flight?... show more I will have a longer layover at the O Hare airport on Sept 11. I have a friend who lives in Chicago who would like to possibly meet me for a drink. I know he won t be able to meet me at the terminals, but can I meet him on the other side of security and then go back through security to catch my connecting flight? Also is there anywhere to get a drink on other side of security in the airport? If not is there anything right outside the airport? This will be my first time at O Hare airport and I m unfamiliar with it. Any help would be great.
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