instruction:
Given a travel related situation, and given a specific question about the situation, summarize the question into a title
question:
What happens if you book tickets through an airline or travel agent, but on the travel date miss a connecting flight (either because the first flight was delayed, or because immigration/security took too long at the connecting airport)? Will you be put on the next flight for free? Are you expected to pay for a new ticket or a change fee? I'm specifically wondering about Continental/United, but also curious about airlines in general.

answer:
What happens if you miss a connecting flight?

question:
My US child passport expires on December 4, 2016, and I'm planning on traveling in December.
I know I need a new child passport to travel then.

However, I turn 16 in June 2017.
After I turn 16, would I still be able to travel on a child passport until it expires (around December 2021, I would be 20 years old) or would I need an adult passport then?

answer:
Child passport validity

question:
My minor daughter is traveling by herself internationally, leaving from Boston's Logan airport.

It's the first time she's traveled via air on her own, and I'd like to go with her to her gate (past security) to make sure she doesn't have any hassles.

I've seen some indications that it's possible to do this, but I've not had any luck figuring out how to do it.

Is this possible?

If so, how? Do I need the airline to OK it? TSA? Someone at Massport?

--

Closed, and the dupe helped me. The airline is United, and they explicitly say on their website (I was missing the key phrase "gate pass" in my searches):

answer:
How do I get airside at Boston's Logan airport without a boarding pass?