TSA while be able to help you..
If he is traveling alone ans under age TSA will allow you to meet him at the gate. You muat check-in with his flightt information and full name, please bring ID. Contact the airline as well and and a gate agent can also meet you baggage claim. Hope this helps.
Ask someone there if you could stay there and explain your situation
Call your airline and they will make at a gments for you
Call tsa. It is possible but there are a fewthings u need. Each airline is different. Call tsa or the air line..
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