Originally Posted by
Kasierith
First, this is in the EU, not the US. The TSA makes Moscow airport security look warm and inviting.
Second, even in the US, you don't have to have a boarding pass to get through. You just have to show something like a digital receipt. That way, for example, if your child is coming back from a school trip from out of the country, you can present said digital receipt, explain that your child is coming off the flight and you want to greet them at the gate, and go through that way.